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April Love is an American musical directed by Henry Levin and produced by David Weisbart , based on the novel Phantom Filly by George Agnew Chamberlain ( New York , 1941 ) .
 American, Henry Levin, David Weisbart, New York
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 American, Henry Levin, David Weisbart, New York