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The Leghorn Blows at Midnight is a 1949 Foghorn Leghorn cartoon , released by Warner Bros. in 1950 , which was directed by Robert McKimson .
 Warner Bros., Robert McKimson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Warner Bros., Robert McKimson