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The screenplay , based on P. D. James ' 1992 novel " The Children of Men " , was credited to five writers , with Clive Owen making uncredited contributions .
 P. D. James, Clive Owen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 P. D. James, Clive Owen