Complex sentence: She began competing in wheelchair basketball in 1993 and first represented Australia in the sport in 2003; in the latter year she won a gold medal as part of the under 20 Australian team at the New Zealand National Basketball tournament.
Split into simpler sentences: She began competing in wheelchair basketball in 1993 and first represented Australia in the sport in 2003. That year she won a gold medal as part of the under 20 Australian team at the New Zealand National Basketball tournament.