Question: The Peoria (or Peouaroua) are a Native American people, and historically, they were part of which organization, sometimes referred to as the Illiniwek or Illini, was a group of 12–13 Native American tribes in the upper Mississippi River valley of North America?
Sentence (from "Illinois Confederation"): The Illinois Confederation, sometimes referred to as the Illiniwek or Illini, was a group of 12–13 Native American tribes in the upper Mississippi River valley of North America.
Relevant evidence: Yes