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Constructorol - Sergei Rogachev ( 42nd ) , Gennadi Skidan
 Sergei Rogachev, Gennadi Skidan, Constructorol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 Sergei Rogachev, Gennadi Skidan, Constructorol