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: First Bulgarian Empire | Statement: [Kievan Rus' invasion of Bulgaria, combatant, First Bulgarian Empire]

Target entity: First Bulgarian Empire
Context triple: [Kievan Rus' invasion of Bulgaria, combatant, First Bulgarian Empire]

• A. First Bulgarian Empire chosen
  The First Bulgarian Empire was a medieval Balkan state that became a major political and cultural power in Eastern Europe, playing a key role in the spread of Slavic literacy and Orthodox Christianity.
• B. Bulgarian Empire
  The Bulgarian Empire was a powerful medieval state on the Balkan Peninsula that played a major role in Southeast European politics, culture, and warfare between the 7th and 14th centuries.
• C. Second Bulgarian Empire
  The Second Bulgarian Empire was a medieval Bulgarian state (1185–1396) that emerged after a successful uprising against Byzantine rule and became a major political and cultural power in the Balkans before falling to the Ottoman Empire.
• D. Old Great Bulgaria
  Old Great Bulgaria was a 7th-century Bulgar state on the Pontic–Caspian steppe that formed an important early political center of the Bulgars before their migration and the establishment of the First Bulgarian Empire.
• E. Old Great Bulgar Khanate
  Old Great Bulgar Khanate was a 7th-century nomadic Bulgar state in the Pontic–Caspian steppe that served as an important precursor to both the Volga Bulgar and First Bulgarian Empires.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.