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: Upper Mekong region | Statement: [Anglo-Siamese agreements on frontier delimitation, appliesToTerritory, Upper Mekong region]

Target entity: Upper Mekong region
Context triple: [Anglo-Siamese agreements on frontier delimitation, appliesToTerritory, Upper Mekong region]

• A. Greater Mekong Subregion chosen
  The Greater Mekong Subregion is a transnational area in Southeast Asia encompassing the Mekong River basin, known for its economic cooperation program among neighboring countries to promote regional development and integration.
• B. Mekong Delta
  The Mekong Delta is a vast, fertile river delta region in southern Vietnam known for its intricate network of waterways, rice paddies, and floating markets.
• C. Namoi River catchment
  The Namoi River catchment is a major river basin in northern New South Wales, Australia, encompassing agricultural lands and tributaries that drain into the Namoi River before joining the Barwon–Darling river system.
• D. Indochinese Peninsula
  The Indochinese Peninsula is a large mainland region of Southeast Asia encompassing countries such as Vietnam, Thailand, Cambodia, Laos, Myanmar, and parts of Malaysia, known for its diverse cultures, histories, and tropical landscapes.
• E. Red River Delta
  The Red River Delta is a densely populated and fertile alluvial plain in northern Vietnam that serves as a major agricultural, economic, and cultural heartland of the country.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.