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De Niro had known De Palma for several years previously , and his first film role in collaboration with De Palma materialized in 1963 at the age of 20 , when he appeared in The Wedding Party .
 De Niro, De Palma, De Palma
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 De Niro, De Palma, De Palma