MBTA Silver Line
E25599
The MBTA Silver Line is a bus rapid transit service in Boston that operates in dedicated lanes and tunnels, linking key neighborhoods, Logan Airport, and South Station.
All labels observed (9)
| Label | Occurrences |
|---|---|
| MBTA Silver Line canonical | 26 |
| Silver Line (MBTA) | 2 |
| Logan Airport via Silver Line | 1 |
| MBTA Silver Line SL3 | 1 |
| MBTA Silver Line SL4 | 1 |
| MBTA Silver Line SL5 | 1 |
| MBTA Silver Line branding | 1 |
| MBTA Silver Line service | 1 |
| MBTA Silver Line system | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T38471 — 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 Silver Line Context triple: [MBTA Red Line, connectsWith, MBTA Silver Line]
-
A.
MBTA Blue Line
The MBTA Blue Line is a rapid transit line in the Boston metropolitan area that runs primarily along the city’s northeastern corridor, connecting downtown Boston with East Boston, Logan Airport, and Revere.
-
B.
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.
-
C.
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.
-
D.
MBTA Red Line
The MBTA Red Line is a major rapid transit line in the Boston metropolitan area that runs through key communities including Cambridge, connecting them to downtown Boston and other parts of the region.
-
E.
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.
- 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 Silver Line Target entity description: The MBTA Silver Line is a bus rapid transit service in Boston that operates in dedicated lanes and tunnels, linking key neighborhoods, Logan Airport, and South Station.
-
A.
MBTA Blue Line
The MBTA Blue Line is a rapid transit line in the Boston metropolitan area that runs primarily along the city’s northeastern corridor, connecting downtown Boston with East Boston, Logan Airport, and Revere.
-
B.
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.
-
C.
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.
-
D.
MBTA Red Line
The MBTA Red Line is a major rapid transit line in the Boston metropolitan area that runs through key communities including Cambridge, connecting them to downtown Boston and other parts of the region.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
bus rapid transit system
ⓘ
public transit service ⓘ |
| branding | Silver Line ⓘ |
| color | silver ⓘ |
| connectsWith |
Amtrak services at South Station
ⓘ
MBTA Blue Line via Airport Station shuttle connections ⓘ MBTA Commuter Rail network ⓘ
surface form:
MBTA Commuter Rail
MBTA Red Line ⓘ |
| electrification | overhead catenary in tunnel sections ⓘ |
| farePolicy | free inbound from Logan Airport to South Station on some routes ⓘ |
| fareSystem | MBTA fare system ⓘ |
| hasSection |
Washington Street surface section
ⓘ
Waterfront tunnel section ⓘ |
| hasStation |
Airport
ⓘ
Chelsea ⓘ Courthouse ⓘ Silver Line Way ⓘ World Trade Center (reconstructed complex) ⓘ
surface form:
World Trade Center
|
| infrastructureType | bus rapid transit ⓘ |
| line |
SL1
ⓘ
SL2 ⓘ SL3 ⓘ SL4 ⓘ SL4 ⓘ
surface form:
SL5
|
| locatedIn |
Boston, Massachusetts
ⓘ
surface form:
Boston
Massachusetts ⓘ United States of America ⓘ
surface form:
United States
|
| opened | 2002 ⓘ |
| operator |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| partOf |
MBTA bus network
ⓘ
MBTA ⓘ
surface form:
MBTA rapid transit system
|
| propulsion | diesel on surface sections ⓘ |
| regionServed | Greater Boston ⓘ |
| serves |
Chelsea
ⓘ
Downtown Boston ⓘ Logan International Airport ⓘ Seaport District ⓘ South Boston ⓘ |
| serviceType |
airport connector
ⓘ
limited-stop service ⓘ |
| terminus | South Station ⓘ |
| uses |
busway tunnels
ⓘ
dedicated bus lanes ⓘ |
| usesTunnel | South Boston Transitway ⓘ |
| vehicleType |
bus
ⓘ
dual-mode bus ⓘ |
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 Silver Line Description of subject: The MBTA Silver Line is a bus rapid transit service in Boston that operates in dedicated lanes and tunnels, linking key neighborhoods, Logan Airport, and South Station.
Referenced by (35)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
MBTA Silver Line SL4
this entity surface form:
MBTA Silver Line SL5
this entity surface form:
MBTA Silver Line service
subject surface form:
Red Line (MBTA)
this entity surface form:
Silver Line (MBTA)
subject surface form:
Chinatown (Boston)
this entity surface form:
Logan Airport via Silver Line
this entity surface form:
MBTA Silver Line system
this entity surface form:
MBTA Silver Line SL3
subject surface form:
Boston Logan International Airport
this entity surface form:
Silver Line (MBTA)