Premise: Adrien Jerome Broner ( born July 28 , 1989 ) is an American professional boxer . He is a former four-weight world champion , having held the WBO junior lightweight title from 2011 to 2012 ; the WBC lightweight title from 2012 to 2013 ; the WBA welterweight title in 2014 ; and the WBA super lightweight title from 2015 to 2016 .
Hypothesis: Adrien Broner is only an amateur boxer.
Label: CONTRADICTION