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in the past two decades what pg 13 biography films did norman cohen direct
 past two decades, pg 13, biography, norman cohen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: genre, year, plot, average ratings, actor, title, song, character, rating, review, director, trailer 
Text: {0} 
Answer:
 past two decades, pg 13, biography, norman cohen