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He studied medicine at the Universities of Halle and Erlangen , where he received his doctorate in 1778 .
 organization: Halle; organization: Erlangen
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: Halle, Erlangen 
Answer:
 organization: Halle; organization: Erlangen