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: South Branch Potomac River system | Statement: [South Fork South Branch Potomac River, partOf, South Branch Potomac River system]

Target entity: South Branch Potomac River system
Context triple: [South Fork South Branch Potomac River, partOf, South Branch Potomac River system]

• A. South Branch Potomac River chosen
  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. 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.
• C. South Fork South Branch Potomac River
  The South Fork South Branch Potomac River is a significant headwater stream in West Virginia that drains a largely rural, mountainous watershed before joining the South Branch of the Potomac River.
• D. 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.
• E. North Fork South Branch Potomac River
  The North Fork South Branch Potomac River is a scenic mountain river in eastern West Virginia known for its rugged valleys, trout fishing, and role in draining part of the Appalachian highlands into the Potomac River system.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.