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The following year , HBO developed a documentary about their rivalry titled " Magic & Bird : A Courtship of Rivals " , which was directed by Ezra Edelman .
 HBO, Ezra Edelman
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 HBO, Ezra Edelman