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: Potomac River watershed | Statement: [Potomac River islands, partOf, Potomac River watershed]

Target entity: Potomac River watershed
Context triple: [Potomac River islands, partOf, Potomac River watershed]

• A. Potomac River region
  The Potomac River region is a historically significant area along the Potomac River in the eastern United States, known for its early colonial estates, ties to prominent Virginia families, and proximity to the nation’s capital.
• B. Potomac River chosen
  The Potomac River is a major waterway in the Mid-Atlantic United States that flows through the Appalachian region and forms part of the boundary between Maryland, Virginia, and Washington, D.C.
• C. Severn River system
  The Severn River system is the interconnected network of the River Severn and its tributaries, forming one of the major drainage basins in Great Britain.
• D. Shenandoah River
  The Shenandoah River is a scenic waterway flowing through Virginia and West Virginia, famed for its pastoral valleys, Blue Ridge Mountain backdrop, and prominence in American folk music and Civil War history.
• E. Anacostia River and Potomac River
  The Anacostia River and Potomac River are two major waterways in the Washington, D.C. area whose confluence forms a significant geographic and ecological feature of the region.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.