Premise: Evander Holyfield ( born October 19 , 1962 ) is an American former professional boxer who competed from 1984 to 2011 . Heavyweight is a weight class in boxing and other combat sports . Mike Tyson . He won the WBC and WBA titles in 1996 , after defeating Frank Bruno and Bruce Seldon by knockout . The World Boxing Association ( WBA ) is the oldest and one of four major organizations which sanction world championship boxing bouts , alongside the IBF , WBC and WBO .
Hypothesis: Mike Tyson avoided professional boxing.
Label: CONTRADICTION