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: Kolubara River line | Statement: [Battle of Kolubara, frontlineFeature, Kolubara River line]

Target entity: Kolubara River line
Context triple: [Battle of Kolubara, frontlineFeature, Kolubara River line]

• A. Restonica River
  The Restonica River is a scenic mountain river in central Corsica, France, renowned for its clear turquoise pools, gorges, and hiking routes near the town of Corte.
• B. Türkmenabat–Kerki line
  The Türkmenabat–Kerki line is a railway route in Turkmenistan that connects the city of Türkmenabat with the town of Kerki as part of the country’s domestic rail network.
• C. Akhmeteli–Varketili Line
  The Akhmeteli–Varketili Line is the main north–south rapid transit line of the Tbilisi Metro system in Georgia.
• D. Iskar River
  The Iskar River is a significant river in Bulgaria that flows south through Sofia before turning north to cut a dramatic gorge through the Balkan Mountains on its way to the Danube.
• E. Kolubara chosen
  Kolubara is a river in western Serbia known for flowing through the Kolubara coal basin before joining the Sava River.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target predicate: frontlineFeature
Context triple: [Battle of Kolubara, frontlineFeature, Kolubara River line]

• A. frontLineFeature chosen
  Indicates that the subject is a prominent or leading characteristic that stands out at the forefront relative to others.
• B. frontLine
  Indicates that an entity is positioned at or associated with the foremost or primary line of engagement, activity, or defense relative to others.
• C. mainFrontlinePeriod
  Indicates the time span during which an entity served as the primary or most active presence on the frontline.
• D. frontlineRole
  Indicates that an entity serves in a primary, direct-contact position at the forefront of an activity, operation, or service.
• E. frontLineBetween
  Indicates that a boundary or line of direct confrontation exists separating two opposing sides or regions.
• F. None of above.