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At the 2009 World Aquatics Championships , Gemmell won silver in the men 's 10-kilometer open water race .
 person: Gemmell
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: Gemmell 
Answer:
 person: Gemmell