Complex sentence: The St. Patrick Cathedral in Fort Worth is a cathedral of the Roman Catholic Church in the United States, am parish of the Diocese of Fort Worth and the seat of its prelate bishop, Bishop Kevin Vann.
Split into simpler sentences: The St. Patrick Cathedral in Fort Worth is a cathedral of the Roman Catholic Church in the United States. It is the mother church of the Diocese of Fort Worth and is the seat of its prelate bishop, Bishop Kevin Vann.