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: MBTA light rail system | Statement: [Mattapan Line (MBTA), partOf, MBTA light rail system]

Target entity: MBTA light rail system
Context triple: [Mattapan Line (MBTA), partOf, MBTA light rail system]

• A. MBTA Commuter Rail network
  The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
• B. MBTA Green Line
  The MBTA Green Line is a light rail service in Boston, Massachusetts, known as one of the oldest subway lines in the United States and serving key neighborhoods, universities, and cultural destinations across the city.
• C. MBTA rapid transit zone
  The MBTA rapid transit zone is the fare and service area designation used by Boston’s subway and light rail system to organize routes, stops, and pricing within the Massachusetts Bay Transportation Authority network.
• D. MBTA Orange Line
  The MBTA Orange Line is a rapid transit line in the Boston metropolitan area that runs roughly north–south, connecting neighborhoods such as Jamaica Plain, Downtown Boston, and Malden.
• E. MBTA Mattapan High-Speed Line
  The MBTA Mattapan High-Speed Line is a light rail trolley service in the Boston area that operates historic PCC streetcars between Ashmont Station in Dorchester and Mattapan, serving communities including Milton, Massachusetts.
• 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: MBTA light rail system
Triple: [Mattapan Line (MBTA), partOf, MBTA light rail system]

The MBTA light rail system is Boston’s network of urban trolley and streetcar lines, commonly known as the Green Line and Mattapan Line, providing high-frequency rail transit across the city and nearby suburbs.

Target entity: MBTA light rail system
Target entity description: The MBTA light rail system is Boston’s network of urban trolley and streetcar lines, commonly known as the Green Line and Mattapan Line, providing high-frequency rail transit across the city and nearby suburbs.

• A. MBTA Commuter Rail network
  The MBTA Commuter Rail network is a regional passenger rail system serving Greater Boston and surrounding communities in Massachusetts and parts of Rhode Island.
• B. MBTA Green Line chosen
  The MBTA Green Line is a light rail service in Boston, Massachusetts, known as one of the oldest subway lines in the United States and serving key neighborhoods, universities, and cultural destinations across the city.
• C. MBTA rapid transit zone
  The MBTA rapid transit zone is the fare and service area designation used by Boston’s subway and light rail system to organize routes, stops, and pricing within the Massachusetts Bay Transportation Authority network.
• D. MBTA Orange Line
  The MBTA Orange Line is a rapid transit line in the Boston metropolitan area that runs roughly north–south, connecting neighborhoods such as Jamaica Plain, Downtown Boston, and Malden.
• E. MBTA Mattapan High-Speed Line
  The MBTA Mattapan High-Speed Line is a light rail trolley service in the Boston area that operates historic PCC streetcars between Ashmont Station in Dorchester and Mattapan, serving communities including Milton, Massachusetts.
• F. None of above.