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 Alexander V | Statement: [Council of Pisa, elected, Antipope Alexander V]

Target entity: Antipope Alexander V
Context triple: [Council of Pisa, elected, Antipope Alexander V]

• A. 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.
• B. John XXIII (antipope)
  John XXIII (antipope) was a rival claimant to the papacy during the Western Schism, recognized by the Pisan obedience but later deposed by the Council of Constance.
• C. Honorius II (antipope)
  Honorius II was an 11th-century antipope who opposed the legitimate papacy during the Investiture Controversy, continuing the imperial-backed schismatic line after Clement III.
• D. Pope Urban VI
  Pope Urban VI was the 14th-century head of the Catholic Church whose controversial election helped trigger the Western Schism.
• E. Wibert of Ravenna (Antipope Clement III)
  Wibert of Ravenna, known as Antipope Clement III, was a rival pope set up by Holy Roman Emperor Henry IV during the Investiture Controversy, serving as the imperial-backed opponent to Pope Gregory VII and his successors.
• 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 Alexander V
Triple: [Council of Pisa, elected, Antipope Alexander V]

Antipope Alexander V was a 15th-century claimant to the papacy during the Western Schism, briefly recognized by parts of the Church after his election at the Council of Pisa in 1409.

Target entity: Antipope Alexander V
Target entity description: Antipope Alexander V was a 15th-century claimant to the papacy during the Western Schism, briefly recognized by parts of the Church after his election at the Council of Pisa in 1409.

• A. 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.
• B. John XXIII (antipope) chosen
  John XXIII (antipope) was a rival claimant to the papacy during the Western Schism, recognized by the Pisan obedience but later deposed by the Council of Constance.
• C. Honorius II (antipope)
  Honorius II was an 11th-century antipope who opposed the legitimate papacy during the Investiture Controversy, continuing the imperial-backed schismatic line after Clement III.
• D. Pope Urban VI
  Pope Urban VI was the 14th-century head of the Catholic Church whose controversial election helped trigger the Western Schism.
• E. Wibert of Ravenna (Antipope Clement III)
  Wibert of Ravenna, known as Antipope Clement III, was a rival pope set up by Holy Roman Emperor Henry IV during the Investiture Controversy, serving as the imperial-backed opponent to Pope Gregory VII and his successors.
• F. None of above.