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Princeton University would award him an honorary LL.D. degree in 1835 , Yale University in 1839 and Harvard University in 1848 .
 Princeton University, Yale University, Harvard University
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Princeton University, Yale University, Harvard University