Question: Beaver County is a county located in the U.S. state of Oklahoma, it is located in the Oklahoma Panhandle, the extreme northwestern region of the state of Oklahoma, in which country?
Sentence (from "Oklahoma Panhandle"): The Oklahoma Panhandle is the extreme northwestern region of the state of Oklahoma, consisting of Cimarron County, Texas County, and Beaver County, from west to east.
Relevant evidence: No