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: Isaac II Angelos | Statement: [Alexios III Angelos, sibling, Isaac II Angelos]

Target entity: Isaac II Angelos
Context triple: [Alexios III Angelos, sibling, Isaac II Angelos]

• A. Alexios IV Angelos
  Alexios IV Angelos was a Byzantine emperor whose alliance with the leaders of the Fourth Crusade led to the crusaders’ intervention in Constantinople and the eventual sack of the city in 1204.
• B. Alexios III Komnenos
  Alexios III Komnenos was a Byzantine emperor of Trebizond from the 14th century, known for consolidating his realm along the Black Sea coast and patronizing Orthodox monastic institutions.
• C. Byzantine Emperor Alexios III Angelos
  Byzantine Emperor Alexios III Angelos was a late 12th- to early 13th-century ruler of the Byzantine Empire whose weak leadership and mismanagement contributed to the empire’s decline and the events leading up to the Fourth Crusade.
• D. John III Doukas Vatatzes
  John III Doukas Vatatzes was a 13th-century Byzantine emperor of Nicaea renowned for restoring stability, economic prosperity, and military strength to the exiled Byzantine state.
• E. John II Komnenos
  John II Komnenos was a 12th-century Byzantine emperor known for his effective military campaigns, administrative reforms, and efforts to restore the strength and territory of the Byzantine Empire.
• 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: Isaac II Angelos
Triple: [Alexios III Angelos, sibling, Isaac II Angelos]

Isaac II Angelos was a Byzantine emperor of the late 12th century whose turbulent reign was marked by internal strife, heavy taxation, and the empire’s growing vulnerability leading up to the Fourth Crusade.

Target entity: Isaac II Angelos
Target entity description: Isaac II Angelos was a Byzantine emperor of the late 12th century whose turbulent reign was marked by internal strife, heavy taxation, and the empire’s growing vulnerability leading up to the Fourth Crusade.

• A. Alexios IV Angelos
  Alexios IV Angelos was a Byzantine emperor whose alliance with the leaders of the Fourth Crusade led to the crusaders’ intervention in Constantinople and the eventual sack of the city in 1204.
• B. Alexios III Komnenos
  Alexios III Komnenos was a Byzantine emperor of Trebizond from the 14th century, known for consolidating his realm along the Black Sea coast and patronizing Orthodox monastic institutions.
• C. Byzantine Emperor Alexios III Angelos
  Byzantine Emperor Alexios III Angelos was a late 12th- to early 13th-century ruler of the Byzantine Empire whose weak leadership and mismanagement contributed to the empire’s decline and the events leading up to the Fourth Crusade.
• D. John III Doukas Vatatzes
  John III Doukas Vatatzes was a 13th-century Byzantine emperor of Nicaea renowned for restoring stability, economic prosperity, and military strength to the exiled Byzantine state.
• E. John II Komnenos
  John II Komnenos was a 12th-century Byzantine emperor known for his effective military campaigns, administrative reforms, and efforts to restore the strength and territory of the Byzantine Empire.
• F. None of above. chosen