87793
His conversion to geography complete , he became professor of geography at Birkbeck College , London in 1944 , returning to King 's in 1947 as its first professor of geography and remaining until his death in 1963 .
 organization: Birkbeck College , London
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: Birkbeck College , London 
Answer:
 organization: Birkbeck College , London