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: Mongol invasion of Rus' | Statement: [Chernigov land, subjectTo, Mongol invasion of Rus']

Target entity: Mongol invasion of Rus'
Context triple: [Chernigov land, subjectTo, Mongol invasion of Rus']

• A. Tatar invasion of Russia chosen
  The Tatar invasion of Russia refers to the series of 13th-century Mongol-Tatar campaigns that devastated the Rus' principalities and led to centuries of domination under the Golden Horde.
• B. Mongol conquest of Cuman–Kipchak steppe
  The Mongol conquest of the Cuman–Kipchak steppe was a 13th-century campaign in which the Mongol Empire subjugated the nomadic Cuman and Kipchak peoples of the Pontic–Caspian steppe, securing control over a vast region of Eurasia and opening the way for further westward expansion.
• C. Mongol conquest of Volga Bulgaria
  The Mongol conquest of Volga Bulgaria was a 13th-century military campaign in which the Mongol Empire subjugated the Volga Bulgar state, securing control over key trade routes in the Middle Volga region.
• D. Mongol–Ryazan War
  The Mongol–Ryazan War was a 13th-century conflict in which Mongol forces devastated the Principality of Ryazan during their invasion of the Rus' principalities.
• E. Mongol invasions of Europe
  The Mongol invasions of Europe were a series of 13th-century military campaigns in which Mongol armies devastated and conquered large parts of Eastern and Central Europe, profoundly impacting the region’s political and social landscape.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.