You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "What is the name of the chief of a Natve American nation from the Great Plains?" whose answer is Quanah Parker.
Each document should contain about 30 words, and these documents should contain useful information.

Query: famous Native American chiefs from the Great Plains
Useful Output:

Doc 1: The Crow Indians were probably the second most common tribe at Fort Union, especially in the early years. The Crows' home was up the Yellowstone River.
Doc 2: Sitting Bull was a Lakota (Teton) chief under whom the Oceti Sakowin (Sioux) tribes united in their struggle against the encroachment of
Doc 3: In 1876, General Custer and members of several Plains Indian tribes, including Crazy Horse and Chief Gall, battled in eastern Montana in what
Doc 4: Chief Joseph, Young Joseph, or Joseph the Younger, was a leader of the wal-lam-wat-kain (Wallowa) band of Nez Perce, a Native American tribe
Doc 5: They fought to keep their lands and protect their people. Meet Chief Joseph, Crazy Horse, Geronimo, Sitting Bull, and Quanah Parker.