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: Vistula River system | Statement: [Martwa Wisła, partOf, Vistula River system]

Target entity: Vistula River system
Context triple: [Martwa Wisła, partOf, Vistula River system]

• A. Vistula River chosen
  The Vistula River is Poland’s longest and most important river, flowing from the Carpathian Mountains to the Baltic Sea and passing through major cities such as Kraków and Warsaw.
• B. Krzyworzeka River
  Krzyworzeka River is a minor river in southern Poland that serves as one of the tributaries feeding into the Raba River.
• C. Oder–Neisse river system
  The Oder–Neisse river system is a major Central European drainage basin centered on the Oder and Neisse rivers, forming much of the modern border between Germany and Poland and emptying into the Baltic Sea.
• D. Oder River
  The Oder River is a major Central European river that flows through the Czech Republic, Poland, and along the Polish–German border before emptying into the Baltic Sea.
• E. Vistula basin
  The Vistula basin is the extensive drainage area of Poland’s longest river, the Vistula, encompassing numerous tributaries and their catchments across much of the country.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.