Red Line and Mattapan Line

E217798

heritage streetcar line light rail line public transit agency public transport service rapid transit line rapid transit station

Red Line and Mattapan Line are two interconnected public transit rail services in the Boston area’s MBTA system, with the Mattapan Line operating as a light rail/heritage trolley branch off the Red Line.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (3)

Label	Occurrences
Ashmont–Mattapan High-Speed Line transfer (historical context as Red Line branch terminus nearby)	1
Ashmont–Mattapan branch of the Red Line	1
Red Line and Mattapan Line canonical	1

How this entity was disambiguated

This entity first appeared as the object of triple T1708291 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Red Line and Mattapan Line
Context triple: [Ashmont, isTransferPointFor, Red Line and Mattapan Line]

A. MBTA Green Line B branch
The MBTA Green Line B branch is a light rail service in Boston that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
B. Green Line E branch
The Green Line E branch is a light rail service of Boston's MBTA Green Line that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
C. MBTA Green Line C branch
The MBTA Green Line C branch is a light rail service in Boston and Brookline that runs primarily along Beacon Street, connecting Cleveland Circle to downtown Boston.
D. MBTA Green Line D branch
The MBTA Green Line D branch is a light rail line in the Boston metropolitan area that runs between downtown Boston and several western suburbs, including Newton and Riverside.
E. MBTA Green Line E branch
The MBTA Green Line E branch is a light rail line in Boston that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street, serving major hospitals, universities, and residential neighborhoods.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Red Line and Mattapan Line
Target entity description: Red Line and Mattapan Line are two interconnected public transit rail services in the Boston area’s MBTA system, with the Mattapan Line operating as a light rail/heritage trolley branch off the Red Line.

A. MBTA Green Line B branch
The MBTA Green Line B branch is a light rail service in Boston that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
B. Green Line E branch
The Green Line E branch is a light rail service of Boston's MBTA Green Line that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
C. MBTA Green Line C branch
The MBTA Green Line C branch is a light rail service in Boston and Brookline that runs primarily along Beacon Street, connecting Cleveland Circle to downtown Boston.
D. MBTA Green Line D branch
The MBTA Green Line D branch is a light rail line in the Boston metropolitan area that runs between downtown Boston and several western suburbs, including Newton and Riverside.
E. MBTA Green Line E branch
The MBTA Green Line E branch is a light rail line in Boston that runs from downtown through the Back Bay and Longwood Medical Area to Heath Street, serving major hospitals, universities, and residential neighborhoods.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	heritage streetcar line ⓘ light rail line ⓘ public transit agency ⓘ public transport service ⓘ public transport service ⓘ rapid transit line ⓘ rapid transit station ⓘ
branchOf	Red Line (MBTA) ⓘ linked to: MBTA Red Line
colorDesignation	red ⓘ
connectsWith	Mattapan Line ⓘ Red Line (MBTA) ⓘ linked to: MBTA Red Line
country	United States ⓘ linked to: United States of America United States ⓘ linked to: United States of America
electrification	overhead catenary ⓘ third rail ⓘ
fareSystem	MBTA subway fare system ⓘ MBTA subway fare system ⓘ
hasBranch	Ashmont branch ⓘ Braintree branch ⓘ
hasConnection	MBTA bus network ⓘ MBTA bus network ⓘ
interchangeStationWith	Ashmont station ⓘ
locatedIn	Dorchester, Boston ⓘ linked to: Dorchester neighborhood of Boston Massachusetts ⓘ Massachusetts ⓘ
opened	1912 ⓘ
operator	Massachusetts Bay Transportation Authority ⓘ linked to: MBTA Massachusetts Bay Transportation Authority ⓘ linked to: MBTA Massachusetts Bay Transportation Authority ⓘ linked to: MBTA
partOf	MBTA light rail system ⓘ linked to: MBTA Green Line MBTA subway system ⓘ linked to: Boston subway
servedBy	Mattapan Line (MBTA) ⓘ linked to: Mattapan Line Red Line (MBTA) ⓘ linked to: MBTA Red Line
serves	Boston ⓘ linked to: Boston, Massachusetts Braintree, Massachusetts NERFINISHED ⓘ Cambridge, Massachusetts ⓘ Dorchester, Boston ⓘ linked to: Dorchester neighborhood of Boston Greater Boston ⓘ Mattapan, Boston ⓘ linked to: Mattapan Quincy, Massachusetts ⓘ Somerville, Massachusetts ⓘ
terminus	Alewife station ⓘ Ashmont station ⓘ Ashmont station ⓘ Braintree station ⓘ Mattapan station ⓘ
trackGauge	standard gauge ⓘ
usesRollingStockType	PCC streetcars ⓘ heavy rail rapid transit cars ⓘ

How these facts were elicited

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Ashmont → isTransferPointFor → Red Line and Mattapan Line ⓘ

Butler station → isOnBranch → Ashmont–Mattapan branch of the Red Line ⓘ

linked to: Red Line and Mattapan Line

Fields Corner station → hasFormerService → Ashmont–Mattapan High-Speed Line transfer (historical context as Red Line branch terminus nearby) ⓘ