Update licensing information

README.md

@@ -1,6 +1,7 @@
 ---
 language:
 - en
+license: other
 paperswithcode_id: reuters-21578
 pretty_name: Reuters-21578 Text Categorization Collection
 dataset_info:
@@ -372,7 +373,21 @@ The data fields are the same among all splits.
 
 ### Licensing Information
 
-[More Information Needed](https://github.com/huggingface/datasets/blob/master/CONTRIBUTING.md#how-to-contribute-to-the-dataset-cards)
+According to the dataset website (https://archive.ics.uci.edu/dataset/137/reuters+21578+text+categorization+collection),
+this dataset is licensed under [Creative Commons Attribution 4.0 International](https://creativecommons.org/licenses/by/4.0/legalcode)
+(C BY 4.0) license.
+
+However, the source data file contains a `README.txt` file with the following information under the
+**Copyright & Notification** section:
+
+> The copyright for the text of newswire articles and Reuters
+annotations in the Reuters-21578 collection resides with Reuters Ltd.
+Reuters Ltd. and Carnegie Group, Inc. have agreed to allow the free
+distribution of this data *for research purposes only*.
+> If you publish results based on this data set, please acknowledge
+its use, refer to the data set by the name "Reuters-21578,
+Distribution 1.0", and inform your readers of the current location of
+the data set (see "Availability & Questions").
 
 ### Citation Information