Premise: Professional boxing , or prizefighting , emerged in the early twentieth century as boxing gradually attained legitimacy and became a regulated , sanctioned sport . Wladimir Wladimirowitsch Klitschko ( Володи́мир Володи́мирович Кличко́ , ; born 25 March 1976 ) is a Ukrainian professional boxer . A strategic and cerebral boxer , Klitschko is considered to be one of the greatest heavyweight champions of all time , as well as among the hardest punching knockout artists in the history of the division ; his strong jab , straight right hand and left hook being his most formidable weapons .
Hypothesis: Wladimir Klitschko is a fighter.
Label: ENTAILMENT