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Sergei Grigoryevich Gorbunov ( ; born April 5 , 1987 ) is a Russia n professional football player .
 Sergei Grigoryevich Gorbunov, 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:
 Sergei Grigoryevich Gorbunov, Russia