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His film début for MGM was in " That Midnight Kiss " ( 1949 ) with Kathryn Grayson and Ethel Barrymore .
 MGM, Kathryn Grayson, Ethel Barrymore
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 MGM, Kathryn Grayson, Ethel Barrymore