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: lower Potomac River | Statement: [St. Mary's River, mouthLocation, lower Potomac River]

Target entity: lower Potomac River
Context triple: [St. Mary's River, mouthLocation, lower Potomac River]

• A. South Branch Potomac River
  The South Branch Potomac River is a major headwater stream of the Potomac River that flows through the Appalachian region of West Virginia and Virginia, known for its scenic valleys, outdoor recreation, and role in the Chesapeake Bay watershed.
• 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. Rapidan River
  The Rapidan River is a tributary of the Rappahannock River in Virginia that played a significant strategic role as a natural barrier during the American Civil War.
• D. North Branch Potomac River
  The North Branch Potomac River is the upper, more remote headwaters section of the Potomac River, flowing along the border of Maryland and West Virginia and supplying a major portion of the Potomac’s overall drainage.
• 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.