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At the time , Howard Klein was Assistant Director at the Rockefeller Foundation and played an instrumental role in the Rockefeller Foundation 's decision to donate to TV Lab at Thirteen/WNET , working with WGBH 's Fred Barzyk and artist Nam June Paik , among others .
 Howard Klein, Rockefeller Foundation, Rockefeller Foundation, Thirteen/WNET
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Howard Klein, Rockefeller Foundation, Rockefeller Foundation, Thirteen/WNET