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The hard-serving O'Brien , a former U.S. collegiate national champion , fired up 17 aces to ultimately subdue the never-say-die Washington .
 person: O'Brien; person: Washington; location: U.S.
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 person: O'Brien; person: Washington; location: U.S.