Complex sentence: Aboriginal peoples in present-day Canada include the First Nations, Inuit, and Métis, the latter being a mixed-blood people who originated in the mid- 17th century when First Nations and Inuit people married European settlers.
Split into simpler sentences: Aboriginal peoples in present-day Canada include the First Nations, Inuit, and Métis. The Métis are a mixed-blood people who originated in the mid- 17th century when First Nations and Inuit people married European settlers.