MBTA Green Line rolling stock
E212786
MBTA Green Line rolling stock comprises the light rail vehicles used on Boston’s Green Line, including multiple generations of trolleys that serve as the backbone of the city’s surface and subway light rail service.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Green Line rolling stock | 2 |
| MBTA Green Line light rail vehicles | 2 |
| MBTA Green Line rolling stock canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1865496 — 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: MBTA Green Line rolling stock Context triple: [MBTA Type 7 Light Rail Vehicle, partOfFleet, MBTA Green Line rolling stock]
-
A.
MBTA Commuter Rail coaches
MBTA Commuter Rail coaches are bi-level and single-level passenger railcars used by the Massachusetts Bay Transportation Authority to provide regional rail service across Greater Boston and surrounding areas.
-
B.
MBTA Type 7 Light Rail Vehicle
The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
-
C.
MBTA Type 8 Light Rail Vehicle
The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
-
D.
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.
-
E.
MBTA Type 9 Light Rail Vehicle
The MBTA Type 9 Light Rail Vehicle is a modern, low-floor streetcar used on Boston’s Green Line that features improved accessibility, passenger comfort, and energy efficiency compared to earlier MBTA light rail fleets.
- 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: MBTA Green Line rolling stock Target entity description: MBTA Green Line rolling stock comprises the light rail vehicles used on Boston’s Green Line, including multiple generations of trolleys that serve as the backbone of the city’s surface and subway light rail service.
-
A.
MBTA Commuter Rail coaches
MBTA Commuter Rail coaches are bi-level and single-level passenger railcars used by the Massachusetts Bay Transportation Authority to provide regional rail service across Greater Boston and surrounding areas.
-
B.
MBTA Type 7 Light Rail Vehicle
The MBTA Type 7 Light Rail Vehicle is a high-floor, articulated streetcar used on Boston’s Green Line, known for its distinctive design and role as one of the system’s primary light rail fleets.
-
C.
MBTA Type 8 Light Rail Vehicle
The MBTA Type 8 Light Rail Vehicle is a low-floor, articulated streetcar used on Boston’s Green Line, designed to improve accessibility and passenger capacity on the system’s light rail routes.
-
D.
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.
-
E.
MBTA Type 9 Light Rail Vehicle
The MBTA Type 9 Light Rail Vehicle is a modern, low-floor streetcar used on Boston’s Green Line that features improved accessibility, passenger comfort, and energy efficiency compared to earlier MBTA light rail fleets.
- F. None of above. chosen
Statements (65)
| Predicate | Object |
|---|---|
| instanceOf |
light rail rolling stock
ⓘ
light rail vehicle ⓘ low-floor light rail vehicle ⓘ low-floor light rail vehicle ⓘ low-floor light rail vehicle ⓘ streetcar ⓘ |
| accessibilityFeature | low-floor vehicles on most trips ⓘ |
| carbodyMaterial | stainless steel ⓘ |
| collectionMethod |
pantograph
ⓘ
pantograph ⓘ pantograph ⓘ pantograph ⓘ |
| designedFor |
street-running operation
ⓘ
tunnel operation ⓘ |
| doorConfiguration | multiple side doors for rapid boarding ⓘ |
| electrification | overhead catenary ⓘ |
| enteredService |
1986
ⓘ
1987 ⓘ 1997 ⓘ 1999 ⓘ 2000 ⓘ 2018 ⓘ 2019 ⓘ |
| floorType |
100% low-floor
ⓘ
high-floor ⓘ partial low-floor ⓘ partial low-floor ⓘ |
| historicallyIncludedClass | PCC streetcar ⓘ |
| includesClass |
Type 10 Light Rail Vehicle
ⓘ
Type 7 Light Rail Vehicle ⓘ
linked to:
MBTA Type 7 Light Rail Vehicle
Type 8 Light Rail Vehicle ⓘ
linked to:
MBTA Type 8 Light Rail Vehicle
Type 9 Light Rail Vehicle ⓘ
linked to:
MBTA Type 9 Light Rail Vehicle
|
| locatedIn |
Boston
ⓘ
linked to:
Boston, Massachusetts
Massachusetts ⓘ United States ⓘ
linked to:
United States of America
|
| lowFloorPercentage |
0
ⓘ
about 70 ⓘ |
| manufacturer |
Ansaldobreda
ⓘ
CAF USA ⓘ
linked to:
CAF
CAF USA ⓘ
linked to:
CAF
Kinki Sharyo ⓘ |
| networkRole | backbone of Boston light rail service ⓘ |
| numberOfSections |
2
ⓘ
3 ⓘ 3 ⓘ |
| operator |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
Massachusetts Bay Transportation Authority ⓘ
linked to:
MBTA
Massachusetts Bay Transportation Authority ⓘ
linked to:
MBTA
Massachusetts Bay Transportation Authority ⓘ
linked to:
MBTA
Massachusetts Bay Transportation Authority ⓘ
linked to:
MBTA
|
| plannedServiceEntry | late 2020s ⓘ |
| powerSupply | 600 V DC ⓘ |
| propulsion | electric traction motors ⓘ |
| railGauge | standard gauge ⓘ |
| trackGauge |
standard gauge
ⓘ
standard gauge ⓘ standard gauge ⓘ standard gauge ⓘ |
| usedOn |
MBTA Green Line
ⓘ
MBTA Green Line ⓘ MBTA Green Line ⓘ MBTA Green Line ⓘ MBTA Green Line ⓘ MBTA Green Line ⓘ |
| withdrawnFromGreenLine | 1980s ⓘ |
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: MBTA Green Line rolling stock Description of subject: MBTA Green Line rolling stock comprises the light rail vehicles used on Boston’s Green Line, including multiple generations of trolleys that serve as the backbone of the city’s surface and subway light rail service.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: MBTA Green Line rolling stock
linked to: MBTA Green Line rolling stock
linked to: MBTA Green Line rolling stock
Reservoir station (MBTA Green Line D branch)
→
usesRollingStock
→
MBTA Green Line light rail vehicles
ⓘ
linked to: MBTA Green Line rolling stock