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The collective survived , and featured an ever-changing roster of like-minded artists including George Brecht , Joseph Beuys , Davi Det Hompson , Daniel Spoerri , Yoko Ono , Emmett Williams and Nam June Paik .
 George Brecht, Joseph Beuys, Davi Det Hompson, Daniel Spoerri, Yoko Ono, Emmett Williams, Nam June Paik
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 George Brecht, Joseph Beuys, Davi Det Hompson, Daniel Spoerri, Yoko Ono, Emmett Williams, Nam June Paik