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Michael Fassbender , Jude Law and Bradley Cooper were all cast as the male lead , before Ewan McGregor played the part .
 Michael Fassbender, Jude Law, Bradley Cooper, Ewan McGregor
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Michael Fassbender, Jude Law, Bradley Cooper, Ewan McGregor