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Gerhard Bock ( born March 6 , 1879 , date of death unknown ) was a German sport shooter who competed in the 1912 Summer Olympics .
 person: Gerhard Bock; location: German
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: Gerhard Bock, German 
Answer:
 person: Gerhard Bock; location: German