Complex sentence: The Archdiocese of Mobile ("Archidioecesis Mobiliensis") is a Catholic Archdiocese covering 22,969 square miles (59,467 km ^ 2) in southern Alabama and Mississippi and governing the Diocese of Biloxi, the Diocese of Birmingham, and the Diocese of Jackson.
Split into simpler sentences: The Archdiocese of Mobile ("Archidioecesis Mobiliensis") is a Catholic Archdiocese covering 22,969 square miles (59,467 km ^ 2) in southern Alabama and Mississippi. It is the metropolitan see of the Province of Mobile, which includes the suffragan bishopric sees of the Diocese of Biloxi, the Diocese of Birmingham, and the Diocese of Jackson.