Complex sentence: The geographic region lies north of Lake Huron (including Georgian Bay), the French River, Lake Nipissing, and the Mattawa River, while the administrative region has several boundaries further south that vary according to federal and provincial government policies and requirements.
Split into simpler sentences: The geographic region lies north of Lake Huron (including Georgian Bay), the French River, Lake Nipissing, and the Mattawa River. The administrative region has several boundaries further south that vary according to federal and provincial government policies and requirements.