Question: The Little Powder River is a tributary of the Powder River, in southeastern Montana and northeastern Wyoming, it drains an area historically known as the Powder River Country, is the Powder River Basin area of the Great Plains in northeastern Wyoming, in which country?
Sentence (from "Powder River Basin"): The basin is so named because it is drained by the Powder River, although it is also drained in part by the Cheyenne River, Tongue River, Bighorn River, Little Missouri River, Platte River, and their tributaries.
Relevant evidence: No