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: Ob River system | Statement: [Tobol River, riverSystem, Ob River system]

Target entity: Ob River system
Context triple: [Tobol River, riverSystem, Ob River system]

• A. Ob River basin chosen
  The Ob River basin is a vast drainage area in western Siberia that collects waters from numerous rivers before they flow northward into the Arctic Ocean.
• B. 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.
• C. Ondava River system
  The Ondava River system is a network of rivers and streams in eastern Slovakia that drains part of the Carpathian region and ultimately contributes to the Bodrog and Tisza river basins.
• D. Ob River
  The Ob River is one of the major rivers of western Siberia in Russia, flowing northward into the Arctic Ocean and forming part of one of the world's largest river systems.
• E. 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.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.