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He graduated as a Civil Engineer from the University of Buenos Aires in 1941 and his professional life was centered on structural engineering .
 organization: Buenos Aires
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Buenos Aires 
Answer:
 organization: Buenos Aires