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Beyoncé embarked on The Mrs. Carter Show World Tour on April 15 in Belgrade , Serbia ; the tour included 132 dates that ran through to March 2014 .
 Beyoncé, Belgrade, Serbia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Beyoncé, Belgrade, Serbia