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: [Irtysh River, riverSystem, Ob–Irtysh river system]

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

• A. 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.
• B. 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.
• C. 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.
• D. Angara River
  The Angara River is a major river in Siberia that flows northward from Lake Baikal through Irkutsk Oblast before joining the Yenisei River.
• E. Bolshaya Kokshaga River
  The Bolshaya Kokshaga River is a significant waterway in central Russia that flows through the Mari El Republic before emptying into the Volga River.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Ob–Irtysh river system
Triple: [Irtysh River, riverSystem, Ob–Irtysh river system]

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.

Target entity: Ob–Irtysh river system
Target entity description: 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.

• A. 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.
• B. 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.
• C. 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.
• D. Angara River
  The Angara River is a major river in Siberia that flows northward from Lake Baikal through Irkutsk Oblast before joining the Yenisei River.
• E. Bolshaya Kokshaga River
  The Bolshaya Kokshaga River is a significant waterway in central Russia that flows through the Mari El Republic before emptying into the Volga River.
• F. None of above. chosen