Complex sentence: Kelly attended Rostrevor College, a Christian Brothers school, where he played trumpet and studied piano, became the first 11 cricket captain, played in the first 18 footall (AFL), and he was named dux of his senior year.
Split into simpler sentences: Kelly attended Rostrevor College, a Christian Brothers school, where he played trumpet and studied piano. A first 11 cricket captain, played in the first 18 footall (AFL), he was named dux of his senior year.