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: antipope Gregory VIII | Statement: [Pope Gelasius II, conflict, antipope Gregory VIII]

Target entity: antipope Gregory VIII
Context triple: [Pope Gelasius II, conflict, antipope Gregory VIII]

• A. Antipope Clement III
  Antipope Clement III, originally Guibert of Ravenna, was a rival claimant to the papacy during the Investiture Controversy, backed by Holy Roman Emperor Henry IV against the legitimate popes of his time.
• B. antipope Felix V
  Antipope Felix V was the last historical antipope, a 15th-century Duke of Savoy who was elected by the Council of Basel in opposition to Pope Eugene IV.
• C. Antipope Felix II
  Antipope Felix II was a 4th-century cleric installed in opposition to Pope Liberius during the Arian controversy, later regarded by the Catholic Church as an illegitimate pope.
• D. Antipope Benedict X
  Antipope Benedict X was a mid-11th-century Roman noble and churchman who claimed the papacy in opposition to the reformist faction, leading to his deposition and replacement by Pope Nicholas II.
• E. Antipope Victor IV
  Antipope Victor IV was a 12th-century claimant to the papacy, backed by Holy Roman Emperor Frederick I Barbarossa in opposition to the legitimate Pope Alexander III during a major schism in the Catholic Church.
• 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: antipope Gregory VIII
Triple: [Pope Gelasius II, conflict, antipope Gregory VIII]

Antipope Gregory VIII was a rival claimant to the papacy during the early 12th century, supported by the Holy Roman Emperor in opposition to the legitimate pope.

Target entity: antipope Gregory VIII
Target entity description: Antipope Gregory VIII was a rival claimant to the papacy during the early 12th century, supported by the Holy Roman Emperor in opposition to the legitimate pope.

• A. Antipope Clement III
  Antipope Clement III, originally Guibert of Ravenna, was a rival claimant to the papacy during the Investiture Controversy, backed by Holy Roman Emperor Henry IV against the legitimate popes of his time.
• B. antipope Felix V
  Antipope Felix V was the last historical antipope, a 15th-century Duke of Savoy who was elected by the Council of Basel in opposition to Pope Eugene IV.
• C. Antipope Felix II
  Antipope Felix II was a 4th-century cleric installed in opposition to Pope Liberius during the Arian controversy, later regarded by the Catholic Church as an illegitimate pope.
• D. Antipope Benedict X
  Antipope Benedict X was a mid-11th-century Roman noble and churchman who claimed the papacy in opposition to the reformist faction, leading to his deposition and replacement by Pope Nicholas II.
• E. Antipope Victor IV
  Antipope Victor IV was a 12th-century claimant to the papacy, backed by Holy Roman Emperor Frederick I Barbarossa in opposition to the legitimate Pope Alexander III during a major schism in the Catholic Church.
• F. None of above. chosen