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Slick eventually took over all managerial duties from Blassie , initially managing Nikolai Volkoff and The Iron Sheik .
 Slick, Blassie, Nikolai Volkoff, The Iron Sheik
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Slick, Blassie, Nikolai Volkoff, The Iron Sheik