MBTA commuter rail at Porter station
E840552
The MBTA commuter rail at Porter station is a regional rail stop in Cambridge, Massachusetts, providing connections between local subway service and longer-distance commuter trains on the Fitchburg Line.
All labels observed (1)
| Label | Occurrences |
|---|---|
| MBTA commuter rail at Porter station canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10082143 — 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 commuter rail at Porter station Context triple: [Red Line Alewife branch, connectsWith, MBTA commuter rail at Porter station]
-
A.
MBTA commuter rail at Back Bay
MBTA commuter rail at Back Bay is a major Boston rail station where regional commuter trains connect with subway services, including the Green Line’s E Branch.
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B.
MBTA Commuter Rail at North Station
MBTA Commuter Rail at North Station is a major Boston rail hub where regional trains connect downtown with numerous suburbs and outlying cities across Massachusetts.
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C.
MBTA commuter rail at Gallagher Terminal
The MBTA commuter rail at Gallagher Terminal is a regional rail service hub in Lowell, Massachusetts, providing passenger train connections between the city and the greater Boston area.
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D.
MBTA Commuter Rail at South Station
MBTA Commuter Rail at South Station is the regional rail service hub in downtown Boston that provides commuter train connections between the city and surrounding suburbs and cities across Massachusetts and neighboring states.
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E.
MBTA commuter rail terminals
MBTA commuter rail terminals are major passenger rail hubs in the Boston area that serve as endpoints and transfer points for regional trains connecting the city with its surrounding suburbs and communities.
- 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 commuter rail at Porter station Target entity description: The MBTA commuter rail at Porter station is a regional rail stop in Cambridge, Massachusetts, providing connections between local subway service and longer-distance commuter trains on the Fitchburg Line.
-
A.
MBTA commuter rail at Back Bay
MBTA commuter rail at Back Bay is a major Boston rail station where regional commuter trains connect with subway services, including the Green Line’s E Branch.
-
B.
MBTA Commuter Rail at North Station
MBTA Commuter Rail at North Station is a major Boston rail hub where regional trains connect downtown with numerous suburbs and outlying cities across Massachusetts.
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C.
MBTA commuter rail at Gallagher Terminal
The MBTA commuter rail at Gallagher Terminal is a regional rail service hub in Lowell, Massachusetts, providing passenger train connections between the city and the greater Boston area.
-
D.
MBTA Commuter Rail at South Station
MBTA Commuter Rail at South Station is the regional rail service hub in downtown Boston that provides commuter train connections between the city and surrounding suburbs and cities across Massachusetts and neighboring states.
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E.
MBTA commuter rail terminals
MBTA commuter rail terminals are major passenger rail hubs in the Boston area that serve as endpoints and transfer points for regional trains connecting the city with its surrounding suburbs and communities.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail station
ⓘ
regional rail stop ⓘ |
| connectsServiceType |
heavy rail rapid transit
ⓘ
local subway service ⓘ |
| connectsTo |
MBTA Red Line
ⓘ
Porter station (MBTA Red Line) ⓘ
linked to:
Porter (MBTA station)
|
| fareSystem | MBTA Commuter Rail zone fare system ⓘ |
| fareZone | Zone 1A ⓘ |
| hasAccessibility |
accessible entrance via Porter Square station complex
ⓘ
elevators ⓘ |
| hasAdjacentStation |
Belmont station
ⓘ
North Station (Boston) ⓘ
linked to:
North Station
|
| hasPlatformType | island platform ⓘ |
| hasStructureType | below-grade station ⓘ |
| lineDirection |
eastbound to North Station
ⓘ
westbound to Fitchburg ⓘ |
| locatedIn |
Cambridge, Massachusetts
ⓘ
Massachusetts ⓘ Middlesex County, Massachusetts ⓘ Porter Square ⓘ United States ⓘ
linked to:
United States of America
|
| numberOfPlatforms | 1 ⓘ |
| numberOfTracks | 2 ⓘ |
| operator |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| ownedBy |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| providesServiceType |
commuter rail
ⓘ
regional rail ⓘ |
| railNetwork |
MBTA Commuter Rail
ⓘ
linked to:
MBTA Commuter Rail network
|
| servedByLine | Fitchburg Line ⓘ |
| servesCity | Cambridge ⓘ |
| servesRegion | Greater Boston ⓘ |
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 commuter rail at Porter station Description of subject: The MBTA commuter rail at Porter station is a regional rail stop in Cambridge, Massachusetts, providing connections between local subway service and longer-distance commuter trains on the Fitchburg Line.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.