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Salkov played for Krylia Sovetov Kuybyshev and Shakhtar Donetsk .
 Salkov, Krylia Sovetov Kuybyshev, Shakhtar Donetsk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Salkov, Krylia Sovetov Kuybyshev, Shakhtar Donetsk