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The supporting cast features Nigel Bruce , John Carradine and Fritz Leiber .
 Nigel Bruce, John Carradine, Fritz Leiber
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Nigel Bruce, John Carradine, Fritz Leiber