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He competed at the 1964 Summer Olympics in Tokyo , where he won a gold medal in the star class , together with Durward Knowles .
 location: Tokyo; person: Durward Knowles
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: Tokyo, Durward Knowles 
Answer:
 location: Tokyo; person: Durward Knowles