72635
In 1930 – 1943 he served as an Associate Professor of History at the University of Chicago , then as a Professor ( 1943 – 1953 , and as a Professor Emeritus from 1953 to 1971 .
 organization: University of Chicago
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: University of Chicago 
Answer:
 organization: University of Chicago