Porter Square MBTA Red Line station
E280277
Porter Square MBTA Red Line station is an underground rapid transit and commuter rail hub in Cambridge, Massachusetts, serving the MBTA Red Line and Fitchburg Line with access to the surrounding Porter Square commercial district.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Porter Square MBTA Red Line station canonical | 1 |
| Porter Square commuter rail station | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2035582 — 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 Square MBTA Red Line station Context triple: [Porter Square Shopping Center, near, Porter Square MBTA Red Line station]
-
A.
MBTA State Street station
MBTA State Street station is a major underground subway station in downtown Boston serving the Orange and Blue Lines near key historic and commercial sites.
-
B.
MBTA Silver Hill station
MBTA Silver Hill station is a small commuter rail stop on the Massachusetts Bay Transportation Authority’s Fitchburg Line serving the Silver Hill neighborhood of Weston, Massachusetts.
-
C.
Massachusetts Avenue station
Massachusetts Avenue station is an underground rapid transit stop in Boston, Massachusetts, located in the South End and served by the MBTA's Orange Line.
-
D.
Boylston station
Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
-
E.
Chestnut Hill station (MBTA Green Line D)
Chestnut Hill station is a light rail stop on Boston’s MBTA Green Line D branch serving the Chestnut Hill neighborhood with access to nearby residential and commercial areas.
- 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 Square MBTA Red Line station Target entity description: Porter Square MBTA Red Line station is an underground rapid transit and commuter rail hub in Cambridge, Massachusetts, serving the MBTA Red Line and Fitchburg Line with access to the surrounding Porter Square commercial district.
-
A.
MBTA State Street station
MBTA State Street station is a major underground subway station in downtown Boston serving the Orange and Blue Lines near key historic and commercial sites.
-
B.
MBTA Silver Hill station
MBTA Silver Hill station is a small commuter rail stop on the Massachusetts Bay Transportation Authority’s Fitchburg Line serving the Silver Hill neighborhood of Weston, Massachusetts.
-
C.
Massachusetts Avenue station
Massachusetts Avenue station is an underground rapid transit stop in Boston, Massachusetts, located in the South End and served by the MBTA's Orange Line.
-
D.
Boylston station
Boylston station is a historic underground light rail stop in downtown Boston that serves the MBTA Green Line.
-
E.
Chestnut Hill station (MBTA Green Line D)
Chestnut Hill station is a light rail stop on Boston’s MBTA Green Line D branch serving the Chestnut Hill neighborhood with access to nearby residential and commercial areas.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail station
ⓘ
rapid transit station ⓘ underground railway station ⓘ |
| accessible | yes ⓘ |
| adjacentNeighborhood |
North Cambridge
ⓘ
Somerville border ⓘ |
| bicycleFacilities | yes ⓘ |
| category |
MBTA Commuter Rail stations in Cambridge, Massachusetts
ⓘ
MBTA Red Line stations ⓘ Railway stations in the United States opened in 1984 ⓘ |
| code | place-portr ⓘ |
| connectsWith |
MBTA bus network
ⓘ
surface form:
MBTA bus
|
| country |
United States of America
ⓘ
surface form:
United States
|
| deepestStationOnLine | MBTA Red Line ⓘ |
| depthBelowSurface | approximately 105 feet ⓘ |
| fareZone | 1A ⓘ |
| formerName | Porter ⓘ |
| hasArtInstallation | Gift of the Wind ⓘ |
| hasElevators | yes ⓘ |
| hasEscalators | yes ⓘ |
| hasStairs | yes ⓘ |
| hasUndergroundLevels | multiple ⓘ |
| locatedIn |
Cambridge, Massachusetts
ⓘ
Massachusetts ⓘ Middlesex County, Massachusetts ⓘ Porter Square ⓘ United States of America ⓘ
surface form:
United States
|
| numberOfPlatforms | 3 ⓘ |
| numberOfTracks | 4 ⓘ |
| openingDate | 1984 ⓘ |
| operator |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| ownedBy |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| parkingAvailable | yes ⓘ |
| partOf |
MBTA Red Line
ⓘ
surface form:
MBTA Red Line Northwest Extension
|
| platformType |
island platform
ⓘ
side platform ⓘ |
| railwayLine |
Fitchburg Line
ⓘ
MBTA Red Line ⓘ |
| serves |
Fitchburg Line
ⓘ
MBTA Red Line ⓘ Porter Square ⓘ
surface form:
Porter Square commercial district
|
| servesCity | Cambridge ⓘ |
| servesRegion | Greater Boston ⓘ |
| structureType | underground ⓘ |
| ticketingSystem |
CharlieCard
ⓘ
CharlieTicket ⓘ |
| type | intermodal transit station ⓘ |
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 Square MBTA Red Line station Description of subject: Porter Square MBTA Red Line station is an underground rapid transit and commuter rail hub in Cambridge, Massachusetts, serving the MBTA Red Line and Fitchburg Line with access to the surrounding Porter Square commercial district.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Porter Square commuter rail station