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Later he was appointed assistant director of the " Allgemeine Poliklinik " , and in 1894 attained the chair of ophthalmology at Vienna .
 organization: Vienna
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: Vienna 
Answer:
 organization: Vienna