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In 1910 he became Director of the Geological Institute at the Hamburg Colonial Institute ( later part of the University of Hamburg ) He followed up his paleontological research on Namibia , with another field trip in 1928 , resulting in many scientific publications .
 organization: Hamburg; organization: University of Hamburg; location: Namibia
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, University of Hamburg, Namibia 
Answer:
 organization: Hamburg; organization: University of Hamburg; location: Namibia