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After graduating Wistar took up studying law , and then began practicing as a lawyer within Philadelphia .
 person: Wistar; location: Philadelphia
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: Wistar, Philadelphia 
Answer:
 person: Wistar; location: Philadelphia