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The first edition takes place in Paris , France , and St. Petersburg , Russia , from 20 April to 1 May 2013 .
 Paris, France, St. Petersburg, Russia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Paris, France, St. Petersburg, Russia