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: Tana River valley | Statement: [Ateni Gorge, partOf, Tana River valley]

Target entity: Tana River valley
Context triple: [Ateni Gorge, partOf, Tana River valley]

• A. Tana River chosen
  The Tana River is Kenya's longest river, flowing from the central highlands to the Indian Ocean and serving as a vital source of water, hydroelectric power, and irrigation.
• B. Tsavo River
  The Tsavo River is a major waterway in southeastern Kenya that flows through the vast Tsavo ecosystem, supporting diverse wildlife and feeding into the Athi–Galana–Sabaki river system.
• C. Rufiji River
  The Rufiji River is Tanzania’s largest river system, flowing through diverse habitats and supporting rich wildlife, particularly within the Selous Game Reserve, before emptying into the Indian Ocean.
• D. Tembesi River
  The Tembesi River is a major river in the Indonesian province of Jambi on the island of Sumatra, serving as an important waterway for the region’s ecology and local communities.
• E. Galana River
  The Galana River is a major waterway in southeastern Kenya that flows through Tsavo National Park, supporting diverse wildlife and ecosystems before emptying into the Indian Ocean.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.