Copper River Basin

Target entity: Copper River Basin
Context triple: [Gulkana River, locatedIn, Copper River Basin]

• A. Copper River
  The Copper River is a major glacial-fed river in south-central Alaska known for its rich salmon runs, extensive delta, and dramatic canyon landscapes.
• B. Pend Oreille River valley
  The Pend Oreille River valley is a scenic, sparsely populated corridor in northeastern Washington and northern Idaho carved by the Pend Oreille River, known for its forested mountains, wildlife, and outdoor recreation.
• C. Tanana Valley
  The Tanana Valley is a broad interior region of Alaska defined by the Tanana River and known for its boreal forests, permafrost landscapes, and subarctic climate.
• D. Nushagak River basin
  The Nushagak River basin is a major watershed in southwestern Alaska known for its pristine ecosystems and highly productive wild salmon fisheries.
• E. Eyak
  The Eyak are an Indigenous people of south-central Alaska whose traditional homeland centers around the Copper River delta and adjacent Gulf of Alaska coast.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Copper River Basin
Target entity description: The Copper River Basin is a broad interior region of southcentral Alaska characterized by glacially fed rivers, wetlands, and tundra, known for its rich wildlife habitat and subsistence resources.

• A. Copper River
  The Copper River is a major glacial-fed river in south-central Alaska known for its rich salmon runs, extensive delta, and dramatic canyon landscapes.
• B. Pend Oreille River valley
  The Pend Oreille River valley is a scenic, sparsely populated corridor in northeastern Washington and northern Idaho carved by the Pend Oreille River, known for its forested mountains, wildlife, and outdoor recreation.
• C. Tanana Valley
  The Tanana Valley is a broad interior region of Alaska defined by the Tanana River and known for its boreal forests, permafrost landscapes, and subarctic climate.
• D. Nushagak River basin
  The Nushagak River basin is a major watershed in southwestern Alaska known for its pristine ecosystems and highly productive wild salmon fisheries.
• E. Eyak
  The Eyak are an Indigenous people of south-central Alaska whose traditional homeland centers around the Copper River delta and adjacent Gulf of Alaska coast.
• F. None of above. chosen