Question: Which region is this tribal group from who fought against the United States Army alongside Palus, Schitsu'umsh (Coeur d'Alene), Spokan, and Yakama warriors at the Battle of Spokane Plains?
{'answer': 'Northwest Plateau', 'supporting_facts': [['Battle of Spokane Plains', 2], ["Pend d'Oreilles", 0]]}