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From 1986 to 1992 , Wersich studied medicine at University of Hamburg and subsequently worked as a physician for Internal medicine , Geriatrics and Gerontology at AK Ochsenzoll hospital and Bethanien hospital until 1999 .
 person: Wersich; organization: University of 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: Wersich, University of Hamburg 
Answer:
 person: Wersich; organization: University of Hamburg