Complex sentence: Southcott joined the party in 1989 while serving as president of the Adelaide Medical Students Society and defeated Senate leader and future Defence Minister Robert Hill, a moderate, in a pre-selection battle for the seat of Boothby in 1994.
Split into simpler sentences: Southcott joined the party in 1989 while serving as president of the Adelaide Medical Students Society. He defeated Senate leader and future Defence Minister Robert Hill, a moderate, in a pre-selection battle for the seat of Boothby in 1994.