Premise: Muhammad Ali ( [ ɑːˈliː ] born Cassius Marcellus Clay Jr. ; January 17 , 1942 -- June 3 , 2016 ) was an American professional boxer and activist . At age 22 in 1964 , he won the WBA , WBC , and lineal heavyweight titles from Sonny Liston in a big upset . He remains the only three-time lineal heavyweight champion , having won the title in 1964 , 1974 , and 1978 . Between February 25 and September 19 , 1964 , Ali reigned as the undisputed heavyweight champion .
Hypothesis: Muhammad Ali won the heavyweight boxing title in 1964.
Label: ENTAILMENT