311650
He graduated in 1975 after a dissertation on the Hamburg labour movement of the early 20th Century , after which he worked as a Hamburg school teacher .
 location: Hamburg; organization: Hamburg
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: Hamburg, Hamburg 
Answer:
 location: Hamburg; organization: Hamburg