Premise: A knockout ( abbreviated to KO or K.O. ) is a fight-ending , winning criterion in several full-contact combat sports , such as boxing , kickboxing , muay thai , mixed martial arts , karate , some forms of taekwondo and other sports involving striking . Mike Tyson . Tyson won his first 19 professional fights by knockout , 12 of them in the first round .
Hypothesis: Mike Tyson was an athlete.
Label: ENTAILMENT