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: Kaloyan of Bulgaria | Statement: [Second Bulgarian Empire, notableRuler, Kaloyan of Bulgaria]

Target entity: Kaloyan of Bulgaria
Context triple: [Second Bulgarian Empire, notableRuler, Kaloyan of Bulgaria]

• A. Khan Krum
  Khan Krum was a powerful early 9th-century Bulgarian ruler known for expanding the First Bulgarian Empire and defeating the Byzantine Empire in major battles.
• B. Ivan Asen I
  Ivan Asen I was a medieval Bulgarian tsar who, together with his brother Peter IV, led the successful uprising against Byzantine rule and helped establish the Second Bulgarian Empire in the late 12th century.
• C. 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.
• D. 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."
• E. Samuel of Bulgaria
  Samuel of Bulgaria was a medieval Tsar who led the First Bulgarian Empire at its height around the turn of the 11th century, fiercely resisting Byzantine expansion until its eventual conquest.
• 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: Kaloyan of Bulgaria
Triple: [Second Bulgarian Empire, notableRuler, Kaloyan of Bulgaria]

Kaloyan of Bulgaria was a powerful tsar of the Second Bulgarian Empire (r. 1197–1207) known for defeating the Crusaders at the Battle of Adrianople and expanding Bulgarian influence in the Balkans.

Target entity: Kaloyan of Bulgaria
Target entity description: Kaloyan of Bulgaria was a powerful tsar of the Second Bulgarian Empire (r. 1197–1207) known for defeating the Crusaders at the Battle of Adrianople and expanding Bulgarian influence in the Balkans.

• A. Khan Krum
  Khan Krum was a powerful early 9th-century Bulgarian ruler known for expanding the First Bulgarian Empire and defeating the Byzantine Empire in major battles.
• B. Ivan Asen I
  Ivan Asen I was a medieval Bulgarian tsar who, together with his brother Peter IV, led the successful uprising against Byzantine rule and helped establish the Second Bulgarian Empire in the late 12th century.
• C. 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.
• D. 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."
• E. Samuel of Bulgaria
  Samuel of Bulgaria was a medieval Tsar who led the First Bulgarian Empire at its height around the turn of the 11th century, fiercely resisting Byzantine expansion until its eventual conquest.
• F. None of above. chosen