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James Walker ( August 16 , 1794 – December 23 , 1874 ) was a Unitarian minister , professor , and President of Harvard College from February 10 , 1853 , to January 26 , 1860 .
 Walker, Harvard College
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Walker, Harvard College