Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: Sagavanirktok River system | Statement: [Atigun River, riverSystem, Sagavanirktok River system]

Target entity: Sagavanirktok River system
Context triple: [Atigun River, riverSystem, Sagavanirktok River system]

• A. Sagavanirktok River chosen
  The Sagavanirktok River is a major river on Alaska’s North Slope that flows north through the Arctic coastal plain to the Beaufort Sea.
• B. Trysilelva river system
  The Trysilelva river system is a major river network in eastern Norway that drains large inland areas before continuing into Sweden as part of the Klarälven–Göta älv watercourse.
• C. Tatshenshini River
  The Tatshenshini River is a remote wilderness river in northwestern British Columbia and the Yukon, renowned for its dramatic glacial landscapes, rich wildlife, and world-class whitewater rafting.
• D. Elde river system
  The Elde river system is a network of rivers and lakes in northeastern Germany that drains much of the Mecklenburg Lake District before flowing into the Elbe.
• E. Naknek River
  The Naknek River is a salmon-rich waterway in southwest Alaska that flows from Naknek Lake to Bristol Bay, supporting major commercial and subsistence fisheries.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.