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Stradling recommended him as a cinematographer to Desilu Productions for their new science fiction series , Star Trek after Harry Stradling , Jr. turned down the role .
 Stradling, Desilu Productions, Harry Stradling
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Stradling, Desilu Productions, Harry Stradling