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He graduated from Yale University in New Haven , Connecticut as M.D. in 1925 and that same year joined the University of Costa Rica 's Faculty of Medicine .
 Yale University, New Haven, Connecticut, University of Costa Rica 's
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yale University, New Haven, Connecticut, University of Costa Rica 's