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After retirement , he was distinguished as Emeritus Professor of both the University of Buenos Aires and the Pontifical Catholic University of Argentina and Doctor Honoris Causa of the University of Buenos Aires .
 University of Buenos Aires, Pontifical Catholic University of Argentina, Buenos Aires
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 University of Buenos Aires, Pontifical Catholic University of Argentina, Buenos Aires