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In 1976 , his growing interest in jazz led to spending a year in Hamburg , Germany , where he studied improvisation with Herb Geller .
 location: Hamburg; location: Germany; person: Herb Geller
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 location: Hamburg; location: Germany; person: Herb Geller