Question: Manuel "Manny" Sobral, is a former boxer, competing in the welterweight (– 69 kg) division, a resident of Vancouver, British Columbia, he represented Canada at which event that took place in the "Chamshil Students' Gymnasium" in Seoul between September the 17th and October the 2nd in 1988?
Sentence (from "Boxing at the 1988 Summer Olympics"): Cuba boycotted the 1988 Olympics which impacted the competition.
Relevant evidence: No