MBTA Line 12 (internal designation)
E789076
MBTA Line 12 (internal designation) is the internal system code used by the Massachusetts Bay Transportation Authority to refer to its commuter rail service known publicly as the Lowell Line.
All labels observed (1)
| Label | Occurrences |
|---|---|
| MBTA Line 12 (internal designation) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9271030 — 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 Line 12 (internal designation) Context triple: [Lowell Line, lineNumber, MBTA Line 12 (internal designation)]
-
A.
MBTA Green Line A branch
The MBTA Green Line A branch was a former light rail line in Boston and its western suburbs that once ran between downtown and Watertown before being replaced by bus service.
-
B.
MBTA Green Line main line
The MBTA Green Line main line is the core light rail trunk of Boston’s Green Line system, running through central Boston and connecting multiple branches that serve surrounding neighborhoods and suburbs.
-
C.
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.
-
D.
MBTA Green Line B branch
The MBTA Green Line B branch is a light rail service in Boston that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
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E.
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.
- 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 Line 12 (internal designation) Target entity description: MBTA Line 12 (internal designation) is the internal system code used by the Massachusetts Bay Transportation Authority to refer to its commuter rail service known publicly as the Lowell Line.
-
A.
MBTA Green Line A branch
The MBTA Green Line A branch was a former light rail line in Boston and its western suburbs that once ran between downtown and Watertown before being replaced by bus service.
-
B.
MBTA Green Line main line
The MBTA Green Line main line is the core light rail trunk of Boston’s Green Line system, running through central Boston and connecting multiple branches that serve surrounding neighborhoods and suburbs.
-
C.
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.
-
D.
MBTA Green Line B branch
The MBTA Green Line B branch is a light rail service in Boston that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
-
E.
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.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
MBTA internal line code
ⓘ
commuter rail line internal designation ⓘ |
| codeType | line number ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| fareSystem | MBTA Commuter Rail fare zones ⓘ |
| hasRouteNumber | 12 ⓘ |
| hasTerminus |
Lowell
ⓘ
linked to:
Lowell, Massachusetts
North Station ⓘ |
| internalDesignationFor | Lowell Line ⓘ |
| isPartOf |
MBTA rail operations
ⓘ
linked to:
MBTA
|
| languageOfDesignation | English ⓘ |
| locatedIn |
Massachusetts
ⓘ
United States ⓘ
linked to:
United States of America
|
| maintainedBy | MBTA ⓘ |
| modeOfTransport | rail ⓘ |
| network |
MBTA commuter rail network
ⓘ
linked to:
MBTA Commuter Rail network
|
| operator |
Massachusetts Bay Transportation Authority
ⓘ
linked to:
MBTA
|
| publicBranding | MBTA Commuter Rail Lowell Line ⓘ |
| publicName | Lowell Line ⓘ |
| regionServed | Greater Boston ⓘ |
| serves |
Boston metropolitan area
ⓘ
linked to:
Greater Boston
|
| system |
MBTA Commuter Rail
ⓘ
linked to:
MBTA Commuter Rail network
|
| usedFor |
internal scheduling
ⓘ
operations management ⓘ system coding ⓘ |
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 Line 12 (internal designation) Description of subject: MBTA Line 12 (internal designation) is the internal system code used by the Massachusetts Bay Transportation Authority to refer to its commuter rail service known publicly as the Lowell Line.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.