Complex sentence: Baie-D'Urfé is largely a "bedroom community" that extends from Autoroute 40 to Lac Saint-Louis--primarily residential, it is characterized by large houses on spacious lots.
Split into simpler sentences: Baie-D'Urfé is largely a "bedroom community" that extends from Autoroute 40 to Lac Saint-Louis. Primarily residential, it is characterized by large houses on spacious lots.