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Leader of party Liberal Russia , Sergei Yushenkov flew to the premier on March 5 , 2002 in London , to announce that his party is going to distribute copies of the film around the country to demonstrate " how the secret services deceived Russian citizens " .
 Sergei Yushenkov
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 Yushenkov