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However , his first defense of that title would come against the 20-year old undefeated sensation Mike Tyson , who was 27 – 0 with 25 of his victories coming by way of knockout .
 Mike Tyson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mike Tyson