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: Mass propers | Statement: [Graduale Romanum, contains, Mass propers]

Target entity: Mass propers
Context triple: [Graduale Romanum, contains, Mass propers]

• A. Ordinary of the Mass
  The Ordinary of the Mass is the set of unchanging texts and chants in the Roman Catholic Eucharistic liturgy, including parts like the Kyrie, Gloria, Credo, Sanctus, and Agnus Dei.
• B. Proper of Saints
  Proper of Saints is the section of the Roman Breviary that contains the variable prayers and readings assigned to specific saints’ feast days throughout the liturgical year.
• C. Ambrosian Mass
  The Ambrosian Mass is the principal Eucharistic liturgy of the Ambrosian Rite, a distinct Western liturgical tradition centered in the Archdiocese of Milan and attributed to St. Ambrose.
• D. Tridentine Mass
  The Tridentine Mass is the traditional Latin liturgy of the Roman Catholic Church codified in the 16th century and used as its standard form of the Mass for several centuries.
• E. Liturgy of the Eucharist
  The Liturgy of the Eucharist is the central part of the Catholic Mass in which bread and wine are consecrated and offered as the sacrament of Christ’s Body and Blood.
• 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: Mass propers
Triple: [Graduale Romanum, contains, Mass propers]

Mass propers are the variable liturgical texts and chants of the Roman Catholic Mass that change according to the feast, season, or specific celebration.

Target entity: Mass propers
Target entity description: Mass propers are the variable liturgical texts and chants of the Roman Catholic Mass that change according to the feast, season, or specific celebration.

• A. Ordinary of the Mass
  The Ordinary of the Mass is the set of unchanging texts and chants in the Roman Catholic Eucharistic liturgy, including parts like the Kyrie, Gloria, Credo, Sanctus, and Agnus Dei.
• B. Proper of Saints
  Proper of Saints is the section of the Roman Breviary that contains the variable prayers and readings assigned to specific saints’ feast days throughout the liturgical year.
• C. Ambrosian Mass
  The Ambrosian Mass is the principal Eucharistic liturgy of the Ambrosian Rite, a distinct Western liturgical tradition centered in the Archdiocese of Milan and attributed to St. Ambrose.
• D. Tridentine Mass
  The Tridentine Mass is the traditional Latin liturgy of the Roman Catholic Church codified in the 16th century and used as its standard form of the Mass for several centuries.
• E. Liturgy of the Eucharist
  The Liturgy of the Eucharist is the central part of the Catholic Mass in which bread and wine are consecrated and offered as the sacrament of Christ’s Body and Blood.
• F. None of above. chosen