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Shortly afterwards Don Ameche , Robert Cummings and Carole Landis were cast .
 Don Ameche, Robert Cummings, Carole Landis
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Don Ameche, Robert Cummings, Carole Landis