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: Schism of 1159 | Statement: [Pope Alexander III, event, Schism of 1159]

Target entity: Schism of 1159
Context triple: [Pope Alexander III, event, Schism of 1159]

• A. Western Schism
  The Western Schism was a prolonged split within the Catholic Church (1378–1417) during which multiple rival claimants to the papacy simultaneously asserted their legitimacy, deeply dividing Christendom.
• B. Photian Schism
  The Photian Schism was a 9th-century ecclesiastical dispute between the Eastern and Western Christian churches centered on the contested patriarchate of Constantinople and papal authority, foreshadowing the later East–West Schism.
• C. East–West Schism
  The East–West Schism was the 1054 split between the Roman Catholic and Eastern Orthodox Churches, driven by long-standing theological, political, and cultural disputes that permanently divided Western and Eastern Christianity.
• D. Investiture Controversy
  The Investiture Controversy was an 11th–12th century power struggle between the papacy and secular rulers over who held the authority to appoint bishops and other high church officials.
• E. Peace of Constance
  The Peace of Constance was a 1183 agreement that ended the conflict between Holy Roman Emperor Frederick I Barbarossa and the Lombard League by recognizing the autonomy of the Italian communes while preserving imperial overlordship.
• 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: Schism of 1159
Triple: [Pope Alexander III, event, Schism of 1159]

The Schism of 1159 was a major papal schism in which rival claimants to the papacy, including Alexander III and an imperial-backed antipope, divided the Church and European politics for nearly two decades.

Target entity: Schism of 1159
Target entity description: The Schism of 1159 was a major papal schism in which rival claimants to the papacy, including Alexander III and an imperial-backed antipope, divided the Church and European politics for nearly two decades.

• A. Western Schism
  The Western Schism was a prolonged split within the Catholic Church (1378–1417) during which multiple rival claimants to the papacy simultaneously asserted their legitimacy, deeply dividing Christendom.
• B. Photian Schism
  The Photian Schism was a 9th-century ecclesiastical dispute between the Eastern and Western Christian churches centered on the contested patriarchate of Constantinople and papal authority, foreshadowing the later East–West Schism.
• C. East–West Schism
  The East–West Schism was the 1054 split between the Roman Catholic and Eastern Orthodox Churches, driven by long-standing theological, political, and cultural disputes that permanently divided Western and Eastern Christianity.
• D. Investiture Controversy
  The Investiture Controversy was an 11th–12th century power struggle between the papacy and secular rulers over who held the authority to appoint bishops and other high church officials.
• E. Peace of Constance
  The Peace of Constance was a 1183 agreement that ended the conflict between Holy Roman Emperor Frederick I Barbarossa and the Lombard League by recognizing the autonomy of the Italian communes while preserving imperial overlordship.
• F. None of above. chosen