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 .
 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:
 University of Chicago