Complex sentence: By the time they were mostly settled on the shores of Georgian Bay, the Huron-Wendat were the primary residents of the north shore of Lake Ontario and somewhere in the 17th century they were pushed out by the Haudenosaunee (Iroquois) people.
Split into simpler sentences: By the time they were mostly settled on the shores of Georgian Bay, the Huron-Wendat were the primary residents of the north shore of Lake Ontario. During the 17th century they were pushed out by the Haudenosaunee (Iroquois) people.