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In 1957 Valentin Zubkov played a front soldier in The Cranes Are Flying ( Letyat zhuravli ) ( 1957 ) and a cowardly villain in The Communist ( Kommunist ) ( 1958 ) .
 Valentin Zubkov
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Valentin Zubkov