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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 .
 Hamburg, University of Hamburg, Namibia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hamburg, University of Hamburg, Namibia