Complex sentence: It was formed from the merger in 1994 of Coteau-Station (north of Autoroute 20) and Coteau-Landing (south of Autoroute 20); prior to 1985 Coteau-Station had been known as Station-du-Coteau.
Split into simpler sentences: It was formed from the merger in 1994 of Coteau-Station (north of Autoroute 20) and Coteau-Landing (south of Autoroute 20). Prior to 1985, Coteau-Station had been known as Station-du-Coteau.