Porter (MBTA station)
E22835
Porter (MBTA station) is a transit station in Cambridge, Massachusetts, serving the MBTA Red Line subway and commuter rail with a notably deep underground platform.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Porter (MBTA station) canonical | 2 |
| Porter Square transit facilities | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T25856 — 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: Porter (MBTA station) Context triple: [Porter, code, Porter (MBTA station)]
-
A.
Wellington Station (MBTA)
Wellington Station (MBTA) is an Orange Line rapid transit station in Medford, Massachusetts, serving as a key park-and-ride and bus transfer hub just north of downtown Boston.
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B.
South Station
South Station is Boston’s major intercity rail and bus terminal and a key MBTA subway hub in the city’s downtown.
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C.
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.
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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.
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E.
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.
- 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: Porter (MBTA station) Target entity description: Porter (MBTA station) is a transit station in Cambridge, Massachusetts, serving the MBTA Red Line subway and commuter rail with a notably deep underground platform.
-
A.
Wellington Station (MBTA)
Wellington Station (MBTA) is an Orange Line rapid transit station in Medford, Massachusetts, serving as a key park-and-ride and bus transfer hub just north of downtown Boston.
-
B.
South Station
South Station is Boston’s major intercity rail and bus terminal and a key MBTA subway hub in the city’s downtown.
-
C.
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.
-
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.
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E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
MBTA station
ⓘ
commuter rail station ⓘ rapid transit station ⓘ |
| connectsToMode |
bus
ⓘ
commuter rail ⓘ subway ⓘ |
| hasAccessibility | accessible ⓘ |
| hasAdjacentStation |
Davis (MBTA station)
ⓘ
Harvard (MBTA station) ⓘ |
| hasArtInstallation | public art in station interior ⓘ |
| hasBicycleFacilities | bicycle parking ⓘ |
| hasBusConnections | MBTA bus routes ⓘ |
| hasDepthCharacteristic | notably deep underground platform ⓘ |
| hasEntranceAt |
Massachusetts Avenue (Cambridge)
ⓘ
surface form:
Massachusetts Avenue
Somerville Avenue ⓘ |
| hasFareControl | MBTA faregates ⓘ |
| hasLighting | artistic interior lighting ⓘ |
| hasParking | no dedicated park-and-ride lot ⓘ |
| hasPassengerInformation | real-time arrival displays ⓘ |
| hasPlatformType |
island platform
ⓘ
side platform ⓘ |
| hasSafetyFeatures |
CCTV surveillance
ⓘ
emergency call boxes ⓘ |
| hasStationCode | Porter ⓘ |
| hasStructureType |
below-grade station
ⓘ
underground station ⓘ |
| hasTicketing | MBTA fare vending machines ⓘ |
| hasTracks |
2 (Fitchburg Line)
ⓘ
2 (Red Line) ⓘ |
| hasVerticalCirculation |
elevators
ⓘ
escalators ⓘ stairs ⓘ |
| hasZone | MBTA Commuter Rail Zone 1A ⓘ |
| locatedIn |
Cambridge, Massachusetts
ⓘ
Massachusetts ⓘ United States of America ⓘ
surface form:
United States
|
| openedForService | Red Line service in the 1980s ⓘ |
| ownedBy |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| partOfSystem |
MBTA Commuter Rail network
ⓘ
surface form:
MBTA Commuter Rail
Boston subway ⓘ
surface form:
MBTA subway
|
| servedByLine |
MBTA Fitchburg Line
ⓘ
surface form:
Fitchburg Line
Red Line ⓘ |
| servedByOperator |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| servedByService |
MBTA Commuter Rail network
ⓘ
surface form:
MBTA Commuter Rail
|
| servesCity |
City of Cambridge
ⓘ
surface form:
Cambridge
|
| servesCorridor | Red Line Northwest Extension corridor ⓘ |
| servesNeighborhood | Porter Square ⓘ |
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: Porter (MBTA station) Description of subject: Porter (MBTA station) is a transit station in Cambridge, Massachusetts, serving the MBTA Red Line subway and commuter rail with a notably deep underground platform.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Porter Square transit facilities