Mattapan yard
E385500
Mattapan Yard is the maintenance and storage facility serving the MBTA’s Mattapan High-Speed Line in Boston, Massachusetts.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mattapan yard canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3753493 — 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: Mattapan yard Context triple: [MBTA Mattapan High-Speed Line, depot, Mattapan yard]
-
A.
Mattapan
Mattapan is a residential neighborhood in Boston, Massachusetts, known for its diverse community and location in the city's southern section.
-
B.
Watertown Yard
Watertown Yard is a Massachusetts Bay Transportation Authority bus facility and former streetcar yard in Watertown, Massachusetts, serving as a key layover and terminal point for several bus routes.
-
C.
Mosholu Yard
Mosholu Yard is a New York City Subway maintenance and storage facility in the Bronx serving trains on the IRT Jerome Avenue Line.
-
D.
Moakley Park
Moakley Park is a large public recreation area in South Boston known for its athletic fields, waterfront location, and community events.
-
E.
Watertown Square
Watertown Square is a major transit and commercial hub in Watertown, Massachusetts, functioning as a key connection point for multiple MBTA bus routes and local activity.
- 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: Mattapan yard Target entity description: Mattapan Yard is the maintenance and storage facility serving the MBTA’s Mattapan High-Speed Line in Boston, Massachusetts.
-
A.
Mattapan
Mattapan is a residential neighborhood in Boston, Massachusetts, known for its diverse community and location in the city's southern section.
-
B.
Watertown Yard
Watertown Yard is a Massachusetts Bay Transportation Authority bus facility and former streetcar yard in Watertown, Massachusetts, serving as a key layover and terminal point for several bus routes.
-
C.
Mosholu Yard
Mosholu Yard is a New York City Subway maintenance and storage facility in the Bronx serving trains on the IRT Jerome Avenue Line.
-
D.
Moakley Park
Moakley Park is a large public recreation area in South Boston known for its athletic fields, waterfront location, and community events.
-
E.
Watertown Square
Watertown Square is a major transit and commercial hub in Watertown, Massachusetts, functioning as a key connection point for multiple MBTA bus routes and local activity.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
rail yard
ⓘ
railway maintenance facility ⓘ transport infrastructure ⓘ |
| adjacentTo | Mattapan station ⓘ |
| connectsTo |
Ashmont–Mattapan High-Speed Line tracks
ⓘ
linked to:
Mattapan Line
|
| country | United States of America ⓘ |
| hasAccess | via Mattapan station tracks ⓘ |
| hasFunction |
light maintenance of rolling stock
ⓘ
overnight storage of Mattapan High-Speed Line fleet ⓘ routine inspection of rolling stock ⓘ |
| infrastructureType | surface rail yard ⓘ |
| isPartOf |
MBTA Red Line family of services
ⓘ
linked to:
MBTA Red Line
|
| locatedIn |
Boston, Massachusetts
ⓘ
Massachusetts ⓘ Mattapan, Boston, Massachusetts ⓘ
linked to:
Mattapan
|
| near |
Milton, Massachusetts
ⓘ
Neponset River ⓘ |
| operatedBy |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| ownedBy |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| partOf |
MBTA light rail network
ⓘ
linked to:
MBTA Green Line
|
| primaryFunction |
maintenance facility for Mattapan High-Speed Line vehicles
ⓘ
storage facility for Mattapan High-Speed Line vehicles ⓘ |
| railGauge | standard gauge ⓘ |
| regionServed |
Dorchester-Mattapan area of Boston
ⓘ
linked to:
Dorchester neighborhood of Boston
|
| servesLine | Mattapan High-Speed Line ⓘ |
| servesRouteTerminus | Mattapan terminus of the Mattapan High-Speed Line ⓘ |
| servesSystem | MBTA ⓘ |
| usedFor | staging of trains for daily service on the Mattapan High-Speed Line ⓘ |
| vehicleTypeServiced |
historic trolley cars
ⓘ
light rail vehicles ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Mattapan yard Description of subject: Mattapan Yard is the maintenance and storage facility serving the MBTA’s Mattapan High-Speed Line in Boston, Massachusetts.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.