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: Kyril, Prince of Preslav | Statement: [Queen Margarita of Bulgaria, relativeByMarriage, Kyril, Prince of Preslav]

Target entity: Kyril, Prince of Preslav
Context triple: [Queen Margarita of Bulgaria, relativeByMarriage, Kyril, Prince of Preslav]

• A. Boris I of Bulgaria
  Boris I of Bulgaria was the 9th-century Bulgarian monarch best known for converting his realm to Christianity and laying the foundations of Slavic literacy and culture.
• B. Theodosius of Tarnovo
  Theodosius of Tarnovo was a 14th-century Bulgarian Orthodox monk and spiritual leader known for promoting hesychasm and shaping medieval Bulgarian religious and literary life.
• C. Simeon I of Bulgaria
  Simeon I of Bulgaria was a powerful medieval Bulgarian tsar whose reign (893–927) marked the political and cultural zenith of the First Bulgarian Empire and earned him the epithet "the Great."
• D. Rostislav of Tmutarakan
  Rostislav of Tmutarakan was an 11th-century Rus' prince from the Rurikid dynasty who ruled the principality of Tmutarakan on the Black Sea and became the progenitor of the Rostislavichi line.
• E. Konstantin of Rostov
  Konstantin of Rostov was a 13th-century Russian prince who ruled Rostov and played a notable role in the complex dynastic politics of the Vladimir-Suzdal principality.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Kyril, Prince of Preslav
Triple: [Queen Margarita of Bulgaria, relativeByMarriage, Kyril, Prince of Preslav]

Kyril, Prince of Preslav is a Bulgarian royal and financier, the second son of former Tsar Simeon II and a prominent member of Bulgaria’s former ruling dynasty.

Target entity: Kyril, Prince of Preslav
Target entity description: Kyril, Prince of Preslav is a Bulgarian royal and financier, the second son of former Tsar Simeon II and a prominent member of Bulgaria’s former ruling dynasty.

• A. Boris I of Bulgaria
  Boris I of Bulgaria was the 9th-century Bulgarian monarch best known for converting his realm to Christianity and laying the foundations of Slavic literacy and culture.
• B. Theodosius of Tarnovo
  Theodosius of Tarnovo was a 14th-century Bulgarian Orthodox monk and spiritual leader known for promoting hesychasm and shaping medieval Bulgarian religious and literary life.
• C. Simeon I of Bulgaria
  Simeon I of Bulgaria was a powerful medieval Bulgarian tsar whose reign (893–927) marked the political and cultural zenith of the First Bulgarian Empire and earned him the epithet "the Great."
• D. Rostislav of Tmutarakan
  Rostislav of Tmutarakan was an 11th-century Rus' prince from the Rurikid dynasty who ruled the principality of Tmutarakan on the Black Sea and became the progenitor of the Rostislavichi line.
• E. Konstantin of Rostov
  Konstantin of Rostov was a 13th-century Russian prince who ruled Rostov and played a notable role in the complex dynastic politics of the Vladimir-Suzdal principality.
• F. None of above. chosen