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Duesenberry attended the University of Michigan , where he earned his Bachelor of Arts in 1939 , his Master of Arts in 1941 , and his Doctor of Philosophy in 1948 .
 Duesenberry, University of Michigan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Duesenberry, University of Michigan