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: Northern Dvina River system | Statement: [Yug River, riverSystem, Northern Dvina River system]

Target entity: Northern Dvina River system
Context triple: [Yug River, riverSystem, Northern Dvina River system]

• A. Northern Dvina river basin
  The Northern Dvina river basin is a large drainage area in northern European Russia whose rivers flow into the White Sea, encompassing extensive forested and rural regions.
• B. Western Dvina River
  The Western Dvina River, also known as the Daugava, is a major Eastern European river flowing from Russia through Belarus and Latvia into the Baltic Sea.
• C. Northern Dvina River chosen
  The Northern Dvina River is a major waterway in northwestern Russia that flows into the White Sea and has long served as an important route for trade and transport.
• D. Volga–Kama river system
  The Volga–Kama river system is a major interconnected river network in European Russia, centered on the Volga and Kama rivers and their tributaries, that drains a vast portion of the East European Plain into the Caspian Sea.
• E. Volga–Oka river network
  The Volga–Oka river network is a major interconnected system of waterways in European Russia centered on the Volga and Oka rivers, supporting regional transport, ecology, and settlement.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.