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 estuary | Statement: [Blue Plains rail bridge, locatedUpstreamOf, Potomac River estuary]

Target entity: Potomac River estuary
Context triple: [Blue Plains rail bridge, locatedUpstreamOf, Potomac River estuary]

• A. Potomac River estuary chosen
  The Potomac River estuary is the tidal lower reach of the Potomac River where it broadens and mixes with Chesapeake Bay waters, forming an important ecological and navigational zone between Maryland and Virginia.
• B. Rappahannock River estuary
  The Rappahannock River estuary is a tidal, brackish-water extension of the Rappahannock River that flows into the Chesapeake Bay in eastern Virginia, supporting rich coastal ecosystems and fisheries.
• C. Choptank River estuary
  The Choptank River estuary is a tidal, brackish-water extension of the Choptank River that forms an important ecological and fisheries habitat along Maryland’s Eastern Shore before emptying into the Chesapeake Bay.
• D. James River estuary
  The James River estuary is a broad tidal extension of the James River in Virginia that forms part of the Chesapeake Bay system and supports significant ecological, economic, and maritime activity in the Tidewater region.
• E. Gloucester River
  The Gloucester River is a river in the Mid North Coast region of New South Wales, Australia, known for flowing through the town of Gloucester and its surrounding rural and scenic landscapes.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.