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–Irtysh river system | Statement: [Vasyugan River, belongsTo, Ob–Irtysh river system]

Target entity: Ob–Irtysh river system
Context triple: [Vasyugan River, belongsTo, Ob–Irtysh river system]

• A. Ob–Irtysh river system chosen
  The Ob–Irtysh river system is a major river network in western Siberia, formed by the Ob River and its principal tributary the Irtysh, and is one of the largest drainage systems in the world.
• B. Angara–Yenisei river system
  The Angara–Yenisei river system is a major Siberian waterway formed by the Angara and Yenisei rivers, draining a vast area of central Asia into the Arctic Ocean.
• C. Irtysh River
  The Irtysh River is a major river in Central Asia and Western Siberia that flows through China, Kazakhstan, and Russia before joining the Ob River.
• D. Upper Angara River
  The Upper Angara River is a major Siberian river in Russia that flows through Buryatia and Zabaykalsky Krai before emptying into Lake Baikal.
• E. Bolshaya Almatinka River
  The Bolshaya Almatinka River is a mountain river in southeastern Kazakhstan that flows through the city of Almaty, supplying it with water and shaping its surrounding landscapes.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.