Complex sentence: The Catholic school's parishes are Holy Rosary, St. Raphael's, St. John's, St. Paul's, and St. Patrick's which are a part of the Diocese of Hamilton, under Bishop David Douglas Crosby.
Split into simpler sentences: The Catholic school's parishes are Holy Rosary, St. Raphael's, St. John's, St. Paul's, and St. Patrick's. It belongs to the Diocese of Hamilton, under Bishop David Douglas Crosby.