Complex sentence: The Roman Catholic Archdiocese of Montréal ("Archdioecesis Marianopolitanis" in Latin) is a Roman Catholic archdiocese that includes part of the Province of Quebec and includes the suffragan dioceses of Joliette, Saint-Jean-Longueuil, Saint-Jérôme, and Valleyfield.
Split into simpler sentences: The Roman Catholic Archdiocese of Montréal ("Archdioecesis Marianopolitanis" in Latin) is a Roman Catholic archdiocese that includes part of the Province of Quebec. The Archbishop of Montréal is Metropolitan of a province that includes the suffragan dioceses of Joliette, Saint-Jean-Longueuil, Saint-Jérôme, and Valleyfield.