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: Danube river system | Statement: [Regen River, partOf, Danube river system]

Target entity: Danube river system
Context triple: [Regen River, partOf, Danube river system]

• A. Danube waterway system
  The Danube waterway system is a major European inland navigation network centered on the Danube River, linking multiple countries and river basins for transport and trade.
• B. Danube River basin
  The Danube River basin is the extensive catchment area of the Danube River, spanning much of Central and Eastern Europe and draining into the Black Sea.
• C. Svratka–Dyje–Morava–Danube river system
  The Svratka–Dyje–Morava–Danube river system is a major Central European fluvial network that drains much of Moravia and surrounding regions into the Danube, ultimately contributing to the Black Sea basin.
• D. Danube chosen
  The Danube is one of Europe's longest and most historically significant rivers, flowing from Germany to the Black Sea and passing through numerous Central and Eastern European countries.
• E. Rhine–Danube watershed
  The Rhine–Danube watershed is the major European drainage divide separating river systems that flow into the North Sea via the Rhine from those that flow into the Black Sea via the Danube.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.