Complex sentence: David competed in the 1984 Games for the Disabled in New York where he won three medals and the 1988 Seoul Paralympics, where he won bronze medals in both the 100 m butterfly and freestyle events.
Split into simpler sentences: David competed in the 1984 Games for the Disabled in New York where he won a bronze medal in the 100 m butterfly. At the 1988 Seoul Paralympics he won bronze medals in both the 100 m butterfly and freestyle events.