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Roswell Gray Ham ( March 11 , 1891 – July 20 , 1983 ) was an American educator who served as the 12th President of Mount Holyoke College from 1937 to 1957 .
 Roswell, Ham, American, Mount Holyoke 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:
 Roswell, Ham, American, Mount Holyoke College