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He became friends with underground film-maker Jonas Mekas , which led to the studios of Andy Warhol , and Bruce Conner all of whom he counted as both teachers and inspirations for his later film work .
 Jonas Mekas, Andy Warhol, Bruce Conner
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jonas Mekas, Andy Warhol, Bruce Conner