 People from many parts of the world took part: Africa, Asia, Australia, Canada, Europe, Middle East, New Zealand, South America and the United States  .
<meaning-changed>  People from many parts of the world took part: Africa, Asia, Australia, Canada, Europe, Middle East, New Zealand, South America and the United States  .
 People from many parts of the world took part: Africa, Asia, Australia, Canada, Europe, Middle East, New Zealand, North America (Canada and the United States .