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In 1997 , he participated a music contest named " Teens Music Festival " hosted by Yamaha in Tohoku region and he became the youngest prize winner .
 organization: Yamaha
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: Yamaha 
Answer:
 organization: Yamaha