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( Bernardino Zapponi : My friend Fellini , Munich 1997 , p. 61 ) After this success , Keller received a number of major roles in mostly Italian productions .
 Bernardino Zapponi, Fellini, Keller
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bernardino Zapponi, Fellini, Keller