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Some of the authors include Oxford University professor John Barton from Oxford University , Cynthia B. Cohen from Georgetown University and Martin Marty from the University of Chicago .
 Oxford, Oxford University, Georgetown University, Martin Marty, University of Chicago
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Oxford, Oxford University, Georgetown University, Martin Marty, University of Chicago