Triple

Target entity: Umatilla people
Context triple: [Plateau of western North America, traditionalInhabitants, Umatilla people]

• A. Umatilla people chosen
  The Umatilla people are a Native American tribe of the Columbia Plateau region in the Pacific Northwest, traditionally living along the Umatilla River in what is now northeastern Oregon.
• B. Chemakum people
  The Chemakum people are an Indigenous group from the Olympic Peninsula in Washington State, historically known for their distinct Chimakuan language and culture and for being signatories to mid-19th-century treaties with the United States.
• C. Molalla people
  The Molalla people are an Indigenous Native American group from western Oregon, now largely represented by descendants within the Confederated Tribes of the Grand Ronde Community.
• D. Klamath people
  The Klamath people are a Native American tribe traditionally inhabiting the Klamath Basin region of southern Oregon, known for their rich fishing culture, complex social organization, and distinctive Plateau cultural traditions.
• E. Kalapuya people
  The Kalapuya people are a Native American group indigenous to western Oregon, known for their distinct language and culture and for traditionally living in small, semi-sedentary communities centered on hunting, fishing, and the management of camas prairies.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.