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She is a two-time Olympian ( 2000 and 2004 ) , and holds multiple age-group records in 200 and 400 m freestyle , and in 50 , 100 , and 200 m butterfly .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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