Complex sentence: He competes in the S9 classification in his main event, the 100m backstroke retiring after a third place and bronze medal at the IPC Swimming World Championships in Montreal 2013.
Split into simpler sentences: He competes in the S9 classification in his main event, the 100m backstroke. Laurence's most recent achievement was a third place and bronze medal at the IPC Swimming World Championships in Montreal 2013.