sentences:  As an amateur, Wladimir Klitschko represented Ukraine at the 1996 Olympics, winning a gold medal in the super-heavyweight division.In 1996, when still an amateur, Vitali Klitschko tested positive for a banned substance and was removed from the Ukrainian boxing team.In June 1999, Vitali Klitschko won the WBO Heavyweight title from Herbie Hide via second-round knockout.