sentences:  In the final he registered a personal best of 9.91 seconds, finishing behind new world record holder Usain Bolt of Jamaica and Richard Thompson of Trinidad and Tobago.The Olympic bronze medal was Dix's first medal at a major international competition.A few days later, he finished fifth in the 200 m final with a time of 19.98 seconds, some distance off the winner Usain Bolt who had broken the world record.