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Manabendra Nath Roy refused to go , dismissing it as ' Zinoviev ’s circus ’ .
 Manabendra Nath Roy, Zinoviev
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Manabendra Nath Roy, Zinoviev