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The film was written and produced by L. Frank Baum and directed by J. Farrell MacDonald .
 L. Frank Baum, J. Farrell MacDonald
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 L. Frank Baum, J. Farrell MacDonald