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To date Callwood has authored two books , both biographies of groups instrumental in establishing the Detroit garage rock scene of the late 60s / early 70s .
 person: Callwood; location: Detroit
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: Callwood, Detroit 
Answer:
 person: Callwood; location: Detroit