317889
He was a fellow of the American Academy of Arts and Sciences , and was elected to the National Academy of Sciences , where he was a member of the Academy 's council for two terms and chairman of biological sciences for one .
 American Academy of Arts and Sciences, National Academy of Sciences
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 American Academy of Arts and Sciences, National Academy of Sciences