Complex sentence: William Wakefield Cardinal Baum (born November 21,1926 in Dallas, Texas) is the senior living Roman Catholic Cardinal from the United States and was the senior Cardinal Priest to participate in the 2005 Papal conclave.
Split into simpler sentences: William Wakefield Cardinal Baum (born November 21,1926 in Dallas, Texas) is an American prelate of the Roman Catholic Church. He is the senior living cardinal, and was the senior Cardinal Priest to participate in the 2005 papal conclave.