Datasets:

MoritzLaurer

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dataset_train_nli

like 3

Know anyone for hire, Callie?"

Callie, know anyone that's for hire?

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mnli

The First Word in Protective & Marine Coatings A Product of Technology Publishing / PaintSquare JPCL | PaintSquare News | Durability + Design | Paint BidTracker May 14 - May 20, 2012 VOC and other government regulations the green building movement advances in materials science and other technology the recessionin Join SSPC and Enhance Your Career !.;

This text is about: protective coatings

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protective coatings

It was in 1904 he and I worked together ”the Abercrombie forgery case ”you remember, he was run down in Brussels.

I met him for the first time in 1915.

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mnli

Mike Pence is a conservative Republican.

Mike Pence . He served as the chairman of the House Republican Conference from 2009 to 2011 . Republican Party (United States) . The Republican Party 's current ideology is American conservatism , which contrasts with the Democrats ' more progressive platform ( also called modern liberalism ) . Further , its platform involves support for free market capitalism , free enterprise , fiscal conservatism , a strong national defense , deregulation , and restrictions on labor unions . In addition to advocating for conservative economic policies , the Republican Party is socially conservative , and seeks to uphold traditional values based largely on Judeo-Christian ethics . as well as from conservative Catholics , Mormons , and Evangelicals nationwide .

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fevernli

Management of Human Capital

There is no way to account for human capital.

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mnli

Abraham Lincoln was President of the Illinois Cheese Makers Association.

Abraham Lincoln ( [ ˈeɪbrəhæm_ˈlIŋkən ] February 12 , 1809 -- April 15 , 1865 ) was an American politician and lawyer who served as the 16th President of the United States from March 1861 until his assassination in April 1865 .

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fevernli

Trinfan knows what he's doin', and I don't think that pinto is goin' to be runnin' loose or alive much longer."Drew pulled a clean shirt over his head.

Trinfan knows what he is doing according to Drew.

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mnli

Nina Simone was an American.

Nina Simone . Born in North Carolina , the sixth child of a preacher , Waymon aspired to be a concert pianist . North Carolina ( [ nɔrθ_kærəˈlaɪnə ] ) is a state in the southeastern region of the United States .

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fevernli

im not sure if all my stuff with andy as in me feeling annoyed at him was just my messed up chemicals

This example tweet expresses the emotion: anger

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emotiondair

anger

For instance, he observes that the Indian subcontinent is not monolithic, but is composed of many ethnic groups with distinct languages, cultures, and cuisines.

The Indian subcontinent is composed of many ethnic groups.

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wanli

Democrats called Bush a wolf in sheep's clothing.

Democrats said Bush was dangerous.

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mnli

On 6 August 1945, a B29 (the Enola Gay) dropped an atomic bomb on the city of Hiroshima, inflicting a level of destruction that astonished even the bomb's designers.

The people who designed the atomic bomb were astonished by its destructive power.

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mnli

The oldest, facing south and telling the story of John the Baptist, were designed by Andrea Pisano in 1330.

The youngest is telling the story of Abraham and Isaac.

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mnli

The line was extended to the southern end of the peninsula in the 1930s.

The line was extended to the northern end of the peninsula in the 1930s.

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wanli

The Dalai Lama's Dharma Talk is held annually at Boston's TD Garden.

TD Garden , often called `` Boston Garden '' and `` The Garden '' , is a multi-purpose arena in Boston .

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fevernli

Still, for barbed wisdom, surprises, and technique, there's no one like Spark.

Spark is unique in wisdom, surprises, and technique.

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lingnli

Finally, there is the notion that it is fair to provide nondiscriminatory downstream access to the delivery network.

Some feel it is fair to provide different access levels to the delivery network.

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mnli

so sad hahaha why relievedface coupon were finished

This example tweet does not express any of the emotions: anger, sadness, or happiness

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emocontext

sad

This bold guess about the solutions to a certain complex-valued infinite series (made by the incomparable Bernhard Riemann in 1859) would, if true, have far-reaching implications for the structure of the most basic of entities, the natural numbers.

Bernhard Riemann finished pointless work in 1906.

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lingnli

And has the following point been made on the Op-Ed that Arianna Huffington and Warren Beatty have chosen to attack centrist Democrats as cynical sellouts who ignore American poverty just when, according to the Census Bureau, those cynical centrists are making the greatest strides against poverty that have been made in my adult lifetime?

Huffington and Beatty attack centrist Democrats weekly.

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mnli

Leonardo da Vinci did not publish his novel about optics.

Leonardo da Vinci . He made substantial discoveries in anatomy , civil engineering , geology , optics , and hydrodynamics , but he did not publish his findings and they had no direct influence on later science .

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fevernli

Sachin Tendulkar is a cricketer.

Sachin Ramesh Tendulkar ( [ sətʃɪn_tɛnˈduːlkər ] born 24 April 1973 ) is a former Indian cricketer and captain , widely regarded as one of the greatest batsmen of all time . Tendulkar played 664 international cricket matches in total , scoring 34,357 runs . The Sir Garfield Sobers Trophy is a cricket trophy awarded annually by the International Cricket Council to its chosen world player of the year .

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fevernli

this is a little bigger than a teacup

This is about the size of a toaster.

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mnli

Really great food st a great price. The shakes were so good they weren't too sweet just the way I like them. The burgers were delicious. I recommend the onion rings over the fries. The cheese on the cheese fries wasn't that great. My second visit I asked for a neopolitan shake which wasn't on the menu and they made it no problem. I would say 4.5 stars if I could.

The sentiment in this example yelp review is positive.

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yelpreviews

positive

In order to create a stable system, it is necessary to control the population growth rate.

In order to create a stable system, it is necessary to have a stable population growth rate.

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wanli

The March<br>Tom's city had an uptick in police violence. Many felt it was getting out of hand. Tom helped orchestrate a protest march. Everything was by the book and the event went well. It helped shine light on the problem.

Since Tom helped to orchestrate the protest march, the event went well even though he was protesting the police and as such refused to follow the law.

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anli

The Prime Minister's XI or PM's XI (formerly Australian Prime Minister's Invitation XI) is an invitational cricket team picked by the Prime Minister of Australia for an annual match held at the Manuka Oval in Canberra against an overseas touring team. The Australian team usually includes up and coming players.

Canberra is known for it's great stadiums.

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anli

Connect With Us Established in 1998 as a small, family owned business in Grand Rapids, Michigan , Field's Fire has grown into a nationwide, full service fire protection company with branch locations in Michigan, Illinois, Indiana and Florida, and partnered coverage across the United States. Learn More Field’s Fire Protection specializes in the Installation, Inspection, Design and Maintenance of Portable Fire Extinguishers, Exit & Emergency Lighting, Automatic Sprinkler Systems, Special Hazard Systems, Fire Alarm Systems and more. There are few things more dangerous than playing with fire, which is why we take the business of protecting your business so seriously. Whether it is designing, installing, inspecting or repairing, Field’s Fire Protection is your single source for fire and life safety needs. Our staff is on call 24 hours a day, 7 days a week, 365 days a year, making sure you are protected We partner with leading companies to provide you with the best service Learn More Field’s Fire Protection is proud to have received certification as a Woman Owned Business in 2009 Learn More Field's Fire Protection, Inc. is a member of the National Fire Protection Association (NFPA)© 2011 Fields Fire Protection Inc. All Rights Reserved.

This text is about: electrical company

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electrical company

Can anybody please help me with the following? I am creating files and directories through a C program, I want to set the permissions for these files and directories. I would like to give 'rx' permission to group and others while the owner of the file should have 'rwx' permission. Please can anybody guide me how I will be able to achieve it.

This text is about: file permissions

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file permissions

be rowdy at any one given time so they they put them outside a lot they try you know to get a lot of good breaks here and there and but uh they just took bookcases and things to move around and sort of what you know sort of build a an idea of a wall and the kids seem to handle it okay but it's it's got some drawbacks to it and uh as if that wasn't bad enough they they also experimented with a particular size school most of the elementary schools were uh seven hundred uh kids in in it only goes from kindergarten up to fifth grade for our elementaries and our particular schools run uh thousand fifty right now

They took bookcases and things to move.

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mnli

Iron Man is not a film.

Iron Man is a 2008 American superhero film based on the Marvel Comics character of the same name , produced by Marvel Studios and distributed by Paramount Pictures . It is the first film in the Marvel Cinematic Universe .

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fevernli

"How Could I Want More" is the debut single by American actress and singer Jamie Lynn Spears. The song was written by Spears and Rivers Rutherford, and was self-released (under the label name Sweet Jamie Music, Inc.) on November 25, 2013 as the lead single from Spears' debut EP, "The Journey".

Jamie Lynn Spears released a single on November 25, 2013, and had not been famous as a singer until then.

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anli

• support a policy of “proceed with extreme caution” on genetic engineering. That is, the safety of New Zealanders and the protection of our environment are paramount and the risks of developments in this technology need to be appropriately assessed.

This example text from a political party manifesto is in favour of environmental protection, e.g. fighting climate change or 'green' policies or preservation of natural resources or animal rights

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manifesto

Environmental Protection

I wanted Matthew to put it in the Savings Bank in the first place , but old Mr. Abbey was a great friend of father 's and he 'd always banked with him .<br>Matthew said any bank with him at the head of it was good enough for anybody . ''<br>`` I think he has only been its nominal head for many years , '' said Anne .

There was a disagreement about which bank to put it in.

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anli

Sphinxes were guardian deitiesinEgyptianmythologyandthis was monumentalprotection,standing73 m (240 ft)longand20 m (66 feet) high.

People used to pray to the Egyptian sphinxes for protection.

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mnli

Elton John was right when he sang, 'Sorry seems to be the hardest word', Especially if you are Asian.

This example does not contain allusions to sexual content.

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not_sex

The history of the bridge is as interesting as the bridge itself.

The history of the bridge is interesting.

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wanli

The adjacent George C. Page Museum of La Brea Discoveries (5801 Wilshire Boulevard) provides fascinating insight into Ice Age life in southern Caleornia.

The museum is located on Hollywood Blvd

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mnli

Ritual Spirit is an EP by British trip hop group Massive Attack, released on 28 January 2016. It features trip hop artist Tricky for the first time since the release of "Protection" in 1994, and also features Scottish hip-hop group Young Fathers, London rapper Roots Manuva and singer Azekel.

Tricky has worked at least twice with Massive Attack

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anli

Timea Bacsinszky is a basketball player.

Timea Bacsinszky ( born 8 June 1989 ) is a Swiss professional tennis player who has reached a career-high ranking of No. 9 and won three singles and four doubles titles on the WTA Tour .

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fevernli

The house was surrounded by trees, and it was on a hill.

The house was in a forest.

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wanli

Edward M. Zwick (born October 8, 1952) is an American filmmaker, director and Academy Award-winning film and television producer. He has worked primarily in the comedy-drama and epic historical film genres, including "About Last Night, Glory, Legends of the Fall," and "The Last Samurai."

Zwick was born after his mom

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anli

Margaret Bryan, Baroness Bryan (c. 1468 – c. 1551/52) was Lady Governess to Henry VIII's children: Princess Mary, Princess Elizabeth, Henry FitzRoy and Prince Edward. The position of Lady Governess in her day resembled less that of the popular modern idea of a governess, more that of a nanny.

margaret was born into political life

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anli

True Blood revolves around Bridget Jones.

True Blood . The series revolves around Sookie Stackhouse ( Anna Paquin ) , a telepathic waitress living in the rural town of Bon Temps , Louisiana , two years after the invention of a synthetic blood that has allowed vampires to `` come out of the coffin '' and allow their presence to be known to mankind .

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fevernli

The Clinton administration is trying to reach a deal with Congress to raise the federal gasoline tax by $2 a gallon to pay for the expansion of the highway system.

The Clinton administration wants to raise the federal gasoline tax.

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wanli

To stimulate discussion, five perspectives are offered below.

Several different viewpoints are shared below.

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mnli

Imagine Dragons first gained exposure in 2012.

Imagine Dragons . The band first gained exposure in 2012 with the releases of their debut studio album Night Visions and its first single `` It 's Time '' .

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fevernli

If it had not been for Warren Rudman (R-New Hampshire), the Legal Services Corp. might have disappeared altogether, Bye said.

Warren Rudman worked very hard to fight for the existence of the Legal Services Corp.

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mnli

Unless you can go back in time, cutting the tax rate on existing capital gains cannot possibly increase investment in productive resources.

Changing other tax rates can have a positive affect.

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lingnli

Ecuador borders other countries.

Ecuador ( [ ˈɛkwədɔːr ] , [ ekwaˈðor ] ) ( Ikwadur ) , officially the Republic of Ecuador ( [ República del Ecuador , ] , which literally translates as `` Republic of the Equator '' ; Ikwadur Ripuwlika ) , is a representative democratic republic in northwestern South America , bordered by Colombia on the north , Peru on the east and south , and the Pacific Ocean to the west .

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fevernli

The Monoposto Racing Club is a single seater, open-wheeled motor racing club in the United Kingdom. Its members race a variety of single seater race cars ranging from 600cc Jedi's to 2000cc Formula Three and Formula Renault cars. "Monoposto" is Italian for 'Single Seater'. As of 2010, it is the largest single seater championship in the UK, with over 60 regular race entrants.

The largest single seater championship in the UK doesn't have over 60 regular race entrants.

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anli

There's no reason to believe that the same level of taxation will be imposed on rich people as on poor people.

Rich people should pay the same tax as poor people.

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wanli

Wayne Rooney won championships.

Wayne Rooney . Since then , with Rooney in the team , United have won the Premier League five times , the UEFA Champions League once , the FIFA Club World Cup once , the FA Community Shield four times , the Football League Cup thrice , the FA Cup once and the UEFA Europa League once . He played at UEFA Euro 2004 and scored four goals , briefly becoming the youngest goalscorer in the history of the European Championship . He has won the England Player of the Year award four times , in 2008 , 2009 , 2014 and 2015 .

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fevernli

The distribution of the original distribution list is available to all employees.

The distribution list is an important document that is distributed to all employees.

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wanli

If you're interested in more than one thing, you're probably not very good at any of them.

If you're interested in more than one thing, you're probably very good at one of them.

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wanli

We support the European Union’s Youth Jobs Guarantee that will provide training or employment to any young person under 25 who is out of work for more than four months, tackling youth unemployment at its root by supporting young people to find and take up work experience and earn new qualifications.

This example text from a political party manifesto is supports market regulation for a fair and open market, for example for consumer protection or for increased competition or for social market economy

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manifesto

Labour Groups: Positive

The guy who wrote that gets hammered from both ends.

The writer is hammered from both ends.

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mnli

How to set up an eclectus habitat<br>Buy the largest aviary/cage possible. The cage you use should be a minimum of 3 feet wide (. 91 m), 2 feet deep (. 6 m), and 4 feet high (1.22 m). Providing a large cage will ensure that your bird has the room it needs to thrive.

Cages should be at least 3 feet wide.

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anli

The government, which had the power to set prices, was unwilling to do so.

The government was unable to set prices.

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wanli

Joe catches fish and Maggie gets laid by other guys--and splits.

Maggie is a faithful girlfriend no matter the circumstances in her relationship with Joe.

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mnli

Happiness in a Four-pack

There's happiness in a four-pack of beer.

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mnli

High court will rule on cable network access WASHINGTON - The Supreme Court, accepting appeals from the cable-television industry and the administration of President George W. Bush, has agreed to decide whether cable operators must open their high-speed data networks to Earthlink Inc.

This example news text is about business news

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agnews

Business

It was said that they were trying to avoid any further embarrassment.

They were trying to avoid any further embarrassment.

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wanli

A Soldier's Daughter Never Cries (October Films).

A Soldier's Daughter Never Cries was endorsed by the original author.

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lingnli

How to develop a professional portfolio<br>Decide how you wish to present your portfolio. The most popular method is to use a 3-ring binder. Don't forget to set yourself up with clear plastic protective inserts for your materials and dividers so that you can categorize your materials.

The most important thing to do is to decide on your presentation when setting out to develop your professional portfolio.

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anli

How to ask for feedback<br>Insist that they prioritize helpfulness. Giving honest feedback can be intimidating; many will react badly to anything they might perceive as criticism. Understand this before you approach someone for feedback.

when asking for feedback make sure helpfulness is the top thing and don't need to lie

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anli

In May of that same year, the Nazis surrendered. Then, in July, that great white flash of light, man-made at Alamogordo, heralded swift and final victory in World War II--and opened the doorway to the atomic age.

This example text from a US presidential speech is about health

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capsotu

Defense

I thank you for the opportunity to work with you to continue that great tradition.

The tradition has been happening for many years.

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mnli

and they really their parents don't bring them up properly they have absolutely no morals because no one taught them

They have no morals because their parents or anyone else did not teach them.

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mnli

Maria Penkova (BUL) Country: Bulgaria, Born June 25, 1984 (28 years old), Category: WTA Profile | Ranking | Results | Statistics WTA Ranking - Career High : 423 Tournaments played in 2006See detailed tennis results of Maria Penkova If you are a player featured in CoreTennis, you can get in touch with us to have more information and your pictures published on your profile

This text is about: golf player

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golf player

Bear River City is a city in Box Elder County, Utah, United States. The population was 853 at the 2010 census, an increase over the 2000 population of 750. The population was sufficient under Utah state law for Bear River to become a city near the end of 2000. Although current state law requires a minimum population of 1000 for cities, Bear River City remains a city.

The population increased by at least 120

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anli

uh we have the Dallas Times Herald and the Dallas Morning News but i don't i don't read newspapers

I don't read the newspapers.

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mnli

and course those those dollar dollar and quarter movies you might catch a spring too so

Movies always cost at least $10.

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mnli

i love the way it feels i love its permanence i love the nostalgic feeling of keys under my fingertips

This example tweet expresses the emotion: fear

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emotiondair

love

After a while, Derry emerged from the web of wire clutching a small crystal disc.

Derry fought his way out of the wire web.

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mnli

If NBC wanted to clone its sitcoms, you think it could aim higher than Suddenly Susan and The Naked Truth , says USA Today 's Matt Roush.

Matt Roush feels that Suddenly Susan and The Naked truth aren't quality sitcoms.

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lingnli

Jim Parsons has gotten four Primetime Emmy Awards.

Jim Parsons . He has received several awards for his performance , including four Primetime Emmy Awards for Outstanding Lead Actor in a Comedy Series and the Golden Globe Award for Best Actor in a Television Series Musical or Comedy .

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fevernli

Golgotha is a 1935 French film about the death of Jesus Christ, released in English-speaking countries as Behold the Man. The film was directed by Julien Duvivier, and stars Harry Baur as Herod, Jean Gabin as Pontius Pilate, and Robert Le Vigan plays Christ.

Golgotha is a 1937 French film about the death of Jesus Christ, released in English-speaking countries as Behold the Man.

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anli

The Alaska Public Safety Commissioner dismissal, also known as Troopergate, involves the possibly illegal July 2008 dismissal of the Alaskan Public Safety Commissioner Walter C. Monegan III by Governor Sarah Palin for not firing Alaskan State Trooper Mike Wooten, who was also Palin's ex-brother-in-law.

Sarah Palin required Alaska Public Safety Commissioner dismissal not firing Alaskan State Trooper Mike Wooten.

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anli

he's uh that's one of the better ones uh i've got i think my favorite that he's done is is A Clear and Present Danger

His least favorite by him was Clear and Present Danger.

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mnli

Hugh Jackman was the winner of a Golden Globe Award.

Hugh Jackman . His work in Les Misérables earned him his first Academy Award nomination for Best Actor and his first Golden Globe Award for Best Actor -- Motion Picture Musical or Comedy in 2013 .

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fevernli

Half fledged she flew by Margaret Heslop Price: $7.99 USD. 48120 words. Published on August 5, 2011. . Nomthandazo spends an idyllic childhood in the hills of Zululand. Her mother suggests she finds a job at a nearby store. She falls in love with Sipho,and, convinced that he feels the same way she foolishly sets off to find him ‘on the mines’. Life’s darker side is brutally made evident to her.Broke and ashamed she finds that some people can be harsh, while others are exceptionally kind.

This text is about: biography

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okay well you see it saw it out there then too

It had very keen eyesight, and it easily picked it out.

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mnli

Tina Turner collaborated with the Red Cross.

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fevernli

I want to know the reason.

What is the reason for this?

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wanli

My father said that this was a free country, that Ron Hoffman was hired as an economist not as a political flack for RN, and that he would not be fired because he disagreed with some aspect of Nixon policy.

My dad said that Hoffman would be fired because he didn't agree with what Nixon did.

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mnli

We categorize these actions into the five components of internal control-control environment, risk assessment, control activities, information and communications, and monitoring-outlined in the Comptroller General's Standards for Internal Control in the Federal Government (GAO-AIMD-00-21.

We are categorizing these actions into five components.

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mnli

During that time, Wilson received the best-play Tony Award for "Fences," plus best-play Tony nominations for six of his other plays, the Pulitzer Prize for both "Fences" and "The Piano Lesson," and (a record) seven New York Drama Critics' Circle prizes.

Wilson received seven New York Drama Critics' Circle prizes

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anli

I was greatly encouraged to see Michael Goff's proposal of a Microsoft fashion-upgrade strategy, titled Dressing Up the Nerds.

Microsoft's strategy of upgrading the fashion of their employees has resulted in higher sales.

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mnli

Then she turned and left.

She ended up staying after she turned.

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mnli

or at least they try and do something about it first

Or at least they won't touch or do anything about it.

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mnli

The end of the story is the beginning of the end.

The story has a definite beginning and end.

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wanli

Edward VIII abdicated.

Edward VIII ( Edward Albert Christian George Andrew Patrick David ; 23 June 1894 -- 28 May 1972 ) was King of the United Kingdom and the Dominions of the British Empire , and Emperor of India , from 20 January 1936 until his abdication on 11 December the same year . Edward knew that the British government , led by Prime Minister Stanley Baldwin , would resign if the marriage went ahead , which could have forced a general election and would ruin his status as a politically neutral constitutional monarch . When it became apparent that he could not marry Wallis and remain on the throne , Edward abdicated . He was succeeded by his younger brother , George VI .

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fevernli

The default procedures provide for the sale of all allowances at a single, clearing price.

Processing multiple sales was a massive inconvenience.

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mnli

uh-huh uh-huh yeah that i've never i don't think i've ever seen um a a vacuum though for the for the lawn i know i've seen the blowers

I have never seen a lawn vacuum before, only blowers.

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mnli

Particulate Air Pollution as a Predictor of Mortality in a Prospective Study of U.S.

This study is about Particulate Air Pollution as a Predictor of Mortality and was revolutionary.

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mnli

an overly melodramatic but somewhat insightful french coming-of-age film . . .

The sentiment in this example rotten tomatoes movie review is positive

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rottentomatoes

positive

This update is bad My phone keeps updating and it keeps saying it has stopped working. I keep rolling it back and it keeps updating. It is annoying

The sentiment in this example app review is negative.

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appreviews

negative

Mark Rubin thinks the Arizona Bar Foundation should look beyond the law office

Rubin thinks the Arizona Bar Foundation needs to look elsewhere for a new leader.

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mnli

Question: Need Physics Help!? I am stuck on this problem and would be really greatful with any help on it. Thanks a bunch!\n\nA bicycle wheel has a diameter of 64.1 cm and a mass of 1.89 kg. Assume that the wheel is a hoop with alll of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand and a resistive force of 123 N is applied tangent to the rim of the tire. \n\na) What force must be applied by a chain passing over a 8.92 cm diameter sprocket if the wheel is to attain an acceleration of 4.49 rad/s2?\n\nb) What force is required if the chain shifts to a 5.61 cm diameter sprocket? Answer: It usually helps with these kinds of problems if you start by drawing a little sketch. It doesn't have to be accurately scaled, its purpose is to help you recognize the physical relationships and to keep your signs correct.\n\nYou are dealing here with rotational motion. You should be familiar with the relation: (alpha) * J = T, where (alpha) means the rotational acceleration, J is the rotational moment of inertia, and T is applied net torque.\n\nYour bicycle wheel has inertia. In general the rotational inertia of an object is (integral)[r^2 dm] where r is measured with respect to the axis of rotation. That's very simple in your case since all your mass is distributed in a thin ring - so r is constant, and you get J = r^2 m. This works out to 0.1941 kg m^2.for your problem.\n\nTorque due to a force applied at a distance from the center of rotation is T = r * F. Now here's where the sketch starts to become useful. The problem tells you that you have one force (123 N) applied at the rim and a second force applied to a sprocket 8.92 cm in diameter, and the net result is acceleration of 4.49 rad/s^2. And the problem tells you that the 123 N force is resisting the motion. So you get:\n\n(alpha) J = T1 + T2\nwhere\nT1 = what we seek\nT2 = -123 N * .3205 m The (-) sign is because it opposes T1.\n\nSolve this to find T1 = 39.6 N-m\ntherefore the force required is T1/r1 = 39.6 / .0446 = 888 N.\n\nIf you have followed this you should be able to do the second part easily.

This example question from the Yahoo Q&A forum is categorized in the topic: Science & Mathematics

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yahootopics

Science & Mathematics