Complex sentence: The UFO's 49 MPPs joined with 11 Labour members to form a coalition government and was the first of a wave of United Farmers governments that took power in several provinces and which founded the Progressive Party of Canada.
Split into simpler sentences: The UFO's 49 MLAs joined with 11 Labour members to form a coalition government. It was the first of a wave of United Farmers governments that took power in several provinces and that founded the Progressive Party of Canada.