Complex sentence: The Champlain River is 66.7 km long flowing on the north shore of St. Lawrence river, between Saint-Maurice River and the Batiscan River watershed, in Les Chenaux Regional County Municipality, in administrative region of Mauricie, in the province of Quebec, Canada.
Split into simpler sentences: The Champlain River is 66.7 km long flowing on the north shore of St. Lawrence river. This river flows between Saint-Maurice River and the Batiscan River watershed, in Les Chenaux Regional County Municipality, in administrative region of Mauricie, in the province of Quebec, Canada.