Triple

Target entity: Columbia Plateau
Context triple: [Spokan people, cultureArea, Columbia Plateau]

• A. Columbia Plateau chosen
  The Columbia Plateau is a vast volcanic and sedimentary region in the Pacific Northwest known for its basalt flows, deep river canyons, and extensive agricultural lands shaped by the Columbia River and its tributaries.
• B. Palouse region
  The Palouse region is a fertile, rolling agricultural area in the northwestern United States, renowned for its distinctive loess hills and extensive wheat and legume farming.
• C. Snake River Plain
  The Snake River Plain is a broad, arc-shaped volcanic and sedimentary lowland in southern Idaho, formed by the movement of the North American Plate over the Yellowstone hotspot and now a major agricultural and geological region.
• D. Lewis–Clark Valley
  Lewis–Clark Valley is a bi-state region along the Snake and Clearwater rivers in Idaho and Washington, centered on the cities of Lewiston and Clarkston and known as a gateway to Hells Canyon and Lewis and Clark’s historic route.
• E. Columbia River Basin
  The Columbia River Basin is a vast watershed in the Pacific Northwest that drains portions of seven U.S. states and British Columbia into the Columbia River, supporting major ecosystems, agriculture, and hydroelectric power.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.