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: Constantine II of Bulgaria | Statement: [Shishman dynasty, hasMember, Constantine II of Bulgaria]

Target entity: Constantine II of Bulgaria
Context triple: [Shishman dynasty, hasMember, Constantine II of Bulgaria]

• A. Boris II of Bulgaria
  Boris II of Bulgaria was a 10th-century Bulgarian tsar whose short and troubled reign marked the beginning of the decline of the First Bulgarian Empire under Byzantine pressure.
• B. Presian I of Bulgaria
  Presian I of Bulgaria was a 9th-century khan who significantly expanded the First Bulgarian Empire into the Balkans prior to the Christianization under his successor Boris I.
• C. Alexander I of Bulgaria
  Alexander I of Bulgaria was the first modern ruler of an autonomous Bulgaria after Ottoman rule, reigning as prince from 1879 to 1886 during the formative years of the Bulgarian state.
• D. Peter IV of Bulgaria
  Peter IV of Bulgaria was a medieval Bulgarian tsar who played a key role in the restoration of Bulgarian independence and the establishment of the Second Bulgarian Empire in the late 12th century.
• E. Michael II Asen of Bulgaria
  Michael II Asen of Bulgaria was a 13th-century tsar of the Second Bulgarian Empire from the Asen dynasty, known for his troubled reign marked by internal strife and foreign intervention.
• 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: Constantine II of Bulgaria
Triple: [Shishman dynasty, hasMember, Constantine II of Bulgaria]

Constantine II of Bulgaria was the last tsar of the medieval Bulgarian Empire, ruling in the late 14th and early 15th centuries during its final struggle against Ottoman conquest.

Target entity: Constantine II of Bulgaria
Target entity description: Constantine II of Bulgaria was the last tsar of the medieval Bulgarian Empire, ruling in the late 14th and early 15th centuries during its final struggle against Ottoman conquest.

• A. Boris II of Bulgaria
  Boris II of Bulgaria was a 10th-century Bulgarian tsar whose short and troubled reign marked the beginning of the decline of the First Bulgarian Empire under Byzantine pressure.
• B. Presian I of Bulgaria
  Presian I of Bulgaria was a 9th-century khan who significantly expanded the First Bulgarian Empire into the Balkans prior to the Christianization under his successor Boris I.
• C. Alexander I of Bulgaria
  Alexander I of Bulgaria was the first modern ruler of an autonomous Bulgaria after Ottoman rule, reigning as prince from 1879 to 1886 during the formative years of the Bulgarian state.
• D. Peter IV of Bulgaria
  Peter IV of Bulgaria was a medieval Bulgarian tsar who played a key role in the restoration of Bulgarian independence and the establishment of the Second Bulgarian Empire in the late 12th century.
• E. Michael II Asen of Bulgaria
  Michael II Asen of Bulgaria was a 13th-century tsar of the Second Bulgarian Empire from the Asen dynasty, known for his troubled reign marked by internal strife and foreign intervention.
• F. None of above. chosen