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: Old Roman introits | Statement: [Old Roman chant, hasSubcategory, Old Roman introits]

Target entity: Old Roman introits
Context triple: [Old Roman chant, hasSubcategory, Old Roman introits]

• A. Old Roman chant
  Old Roman chant is an early form of Western plainchant used in the liturgy of the city of Rome before being largely supplanted by Gregorian chant.
• B. Antiphonale Romanum
  The Antiphonale Romanum is an official liturgical book of the Roman Catholic Church containing the traditional Gregorian chant settings for the Divine Office.
• C. Graduale Romanum
  The Graduale Romanum is the principal liturgical book of the Roman Catholic Church containing the official collection of Gregorian chant for the Mass.
• D. Ambrosian chant
  Ambrosian chant is a liturgical plainchant tradition of the Western Christian Church, distinct from Gregorian chant and historically linked to the Milanese rite.
• E. pre‑Vatican II Rituale Romanum
  The pre‑Vatican II Rituale Romanum is the traditional Latin liturgical book of the Roman Catholic Church containing the rites for administering sacraments and sacramentals as used before the reforms of the Second Vatican Council.
• 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: Old Roman introits
Triple: [Old Roman chant, hasSubcategory, Old Roman introits]

Old Roman introits are a subset of Old Roman chant consisting of the entrance chants used at the beginning of the Mass in the early Roman liturgy.

Target entity: Old Roman introits
Target entity description: Old Roman introits are a subset of Old Roman chant consisting of the entrance chants used at the beginning of the Mass in the early Roman liturgy.

• A. Old Roman chant chosen
  Old Roman chant is an early form of Western plainchant used in the liturgy of the city of Rome before being largely supplanted by Gregorian chant.
• B. Antiphonale Romanum
  The Antiphonale Romanum is an official liturgical book of the Roman Catholic Church containing the traditional Gregorian chant settings for the Divine Office.
• C. Graduale Romanum
  The Graduale Romanum is the principal liturgical book of the Roman Catholic Church containing the official collection of Gregorian chant for the Mass.
• D. Ambrosian chant
  Ambrosian chant is a liturgical plainchant tradition of the Western Christian Church, distinct from Gregorian chant and historically linked to the Milanese rite.
• E. pre‑Vatican II Rituale Romanum
  The pre‑Vatican II Rituale Romanum is the traditional Latin liturgical book of the Roman Catholic Church containing the rites for administering sacraments and sacramentals as used before the reforms of the Second Vatican Council.
• F. None of above.