91751
He taught history at Columbia University ( 1936 – 1944 ) ; Swarthmore College ( 1944 – 1945 ) ; Columbia Graduate School ( 1945 – 1946 ) ; Carleton College ( 1946 – 1970 ) .
 organization: Columbia University; organization: Swarthmore College; organization: Columbia; organization: Carleton College
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: Columbia University, Swarthmore College, Columbia, Carleton College 
Answer:
 organization: Columbia University; organization: Swarthmore College; organization: Columbia; organization: Carleton College