Columbia–Snake River System

Target entity: Columbia–Snake River System
Context triple: [Columbia–Snake River lock system, partOf, Columbia–Snake River System]

• A. 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.
• B. Snake River Basin
  The Snake River Basin is a major watershed in the northwestern United States that drains much of Idaho and parts of neighboring states through the Snake River and its extensive network of tributaries.
• C. Lewis and Clark River
  The Lewis and Clark River is a small coastal river in northwestern Oregon that flows through forested terrain into the Youngs River near Astoria, historically associated with the Lewis and Clark Expedition.
• D. Columbia River
  The Columbia River is a major river of the Pacific Northwest that forms much of the border between Oregon and Washington and is vital for hydroelectric power, transportation, and regional ecosystems.
• E. Sauk–Suiattle River watershed
  The Sauk–Suiattle River watershed is a river basin in the North Cascades of Washington State that drains the Sauk and Suiattle river systems and supports diverse forested and mountainous ecosystems.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Columbia–Snake River System
Target entity description: The Columbia–Snake River System is a major interconnected network of rivers and reservoirs in the Pacific Northwest that serves as a critical corridor for navigation, hydropower generation, irrigation, and regional commerce.

• A. 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.
• B. Snake River Basin
  The Snake River Basin is a major watershed in the northwestern United States that drains much of Idaho and parts of neighboring states through the Snake River and its extensive network of tributaries.
• C. Lewis and Clark River
  The Lewis and Clark River is a small coastal river in northwestern Oregon that flows through forested terrain into the Youngs River near Astoria, historically associated with the Lewis and Clark Expedition.
• D. Columbia River
  The Columbia River is a major river of the Pacific Northwest that forms much of the border between Oregon and Washington and is vital for hydroelectric power, transportation, and regional ecosystems.
• E. Sauk–Suiattle River watershed
  The Sauk–Suiattle River watershed is a river basin in the North Cascades of Washington State that drains the Sauk and Suiattle river systems and supports diverse forested and mountainous ecosystems.
• F. None of above. chosen