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Groucho also rejected Ned Tennant 's script and instead chose to use Sheekman 's script in the end ( even though ironically much of Sheekman 's script was based upon Perelman 's original ideas ) .
 Groucho, Sheekman, Sheekman, Perelman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Groucho, Sheekman, Sheekman, Perelman