Complex sentence: The Canadian portion, the Pacific Cordillera (Canada), likewise includes three primary mountain ranges: the Coast Mountains in the west, the Columbia Mountains in the middle, and the Canadian Rockies in the east.
Split into simpler sentences: The Canadian portion, the Pacific Cordillera (Canada), likewise includes three primary mountain ranges. They are the Coast Mountains in the west, the Columbia Mountains in the middle, and the Canadian Rockies in the east.