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He is a three-time Harvard Yearbook Favorite Professor ( 2011 , 2012 , and 2013 ) , and was one of the 8 Harvard Thinks Big speakers in 2012 ( 8 Harvard faculty chosen by college-wide votes ) .
 Harvard, Harvard, Harvard
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Harvard, Harvard, Harvard