Green Line Extension
E388804
The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Green Line Extension canonical | 11 |
| MBTA Green Line Extension Project | 1 |
| Phase 2 of the Green Line Extension | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3790567 — 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.
Target entity: Green Line Extension Context triple: [Lechmere Square, servedByLine, Green Line Extension]
-
A.
Red Line Northwest Extension corridor
The Red Line Northwest Extension corridor is a planned expansion route of Boston's MBTA Red Line intended to extend rapid transit service northwest from its current terminus.
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B.
Toronto Transit Commission Line 1 extension
The Toronto Transit Commission Line 1 extension is a subway line expansion that extends Toronto’s primary north–south rapid transit route into York Region, improving regional connectivity and access to the city’s transit network.
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C.
Blue Line
The Blue Line is one of the primary heavy-rail transit routes in Atlanta’s MARTA system, running east–west across the metropolitan area and serving key urban and suburban stations.
-
D.
Blue Line
The Blue Line is one of the main lines of the Lisbon Metro system, serving key central and northern areas of Portugal’s capital city.
-
E.
Blue Line
The Blue Line is one of the primary routes of the MetroLink light rail system serving the St. Louis metropolitan area.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Green Line Extension Target entity description: The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
-
A.
Red Line Northwest Extension corridor
The Red Line Northwest Extension corridor is a planned expansion route of Boston's MBTA Red Line intended to extend rapid transit service northwest from its current terminus.
-
B.
Toronto Transit Commission Line 1 extension
The Toronto Transit Commission Line 1 extension is a subway line expansion that extends Toronto’s primary north–south rapid transit route into York Region, improving regional connectivity and access to the city’s transit network.
-
C.
Blue Line
The Blue Line is one of Boston's MBTA rapid transit routes, running primarily between downtown Boston and the coastal communities of East Boston and Revere.
-
D.
Blue Line
The Blue Line is one of the main lines of the Lisbon Metro system, serving key central and northern areas of Portugal’s capital city.
-
E.
Blue Line
The Blue Line is one of the primary routes of the MetroLink light rail system serving the St. Louis metropolitan area.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
light rail extension project
ⓘ
public transit infrastructure project ⓘ |
| cityServedByStation |
Medford, Massachusetts
ⓘ
surface form:
Medford
Somerville, Massachusetts ⓘ
surface form:
Somerville
|
| connectsWithLine |
MBTA Green Line D branch
ⓘ
surface form:
MBTA Green Line D Branch
MBTA Green Line E branch ⓘ
surface form:
MBTA Green Line E Branch
|
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | overhead catenary ⓘ |
| environmentalGoal | reduce greenhouse gas emissions from transportation ⓘ |
| environmentalReviewCompleted | yes ⓘ |
| fareMedia |
CharlieCard
ⓘ
CharlieTicket ⓘ |
| fareSystem | MBTA fare system ⓘ |
| fundedBy |
Massachusetts
ⓘ
surface form:
Commonwealth of Massachusetts
Federal Transit Administration ⓘ |
| hasAccessibilityFeature | all stations are ADA accessible ⓘ |
| includesBranch |
Medford/Tufts Branch
ⓘ
surface form:
Medford Branch
Union Square Branch ⓘ |
| includesStation |
Ball Square
ⓘ
Somerville, Massachusetts ⓘ
surface form:
East Somerville
Gilman Square ⓘ Lechmere ⓘ Magoun Square ⓘ Tufts University Medford/Somerville campus ⓘ
surface form:
Medford/Tufts
Union Square ⓘ |
| locatedInMetropolitanArea | Greater Boston ⓘ |
| modeOfTransport | light rail ⓘ |
| operator |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| owner |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| partOfSystem | MBTA Green Line ⓘ |
| planningIncludes | transit-oriented development opportunities ⓘ |
| projectType | urban rail extension ⓘ |
| purpose |
expand Green Line service into Somerville and Medford
ⓘ
improve public transit access in previously unserved neighborhoods ⓘ reduce automobile dependence in corridor ⓘ |
| safetyFeature | grade-separated from most road traffic ⓘ |
| servesCity |
Boston
ⓘ
Medford, Massachusetts ⓘ
surface form:
Medford
Somerville, Massachusetts ⓘ
surface form:
Somerville
|
| startPoint | Lechmere station ⓘ |
| state | Massachusetts ⓘ |
| terminus |
Medford/Tufts station
ⓘ
Union Square station ⓘ |
| trackGauge | standard gauge ⓘ |
| usesRightOfWay |
MBTA Lowell Line
ⓘ
surface form:
MBTA Lowell Line corridor
former Boston and Maine Railroad corridor ⓘ |
| usesRollingStock |
MBTA Type 7 Light Rail Vehicle
ⓘ
surface form:
MBTA Type 7 light rail vehicle
MBTA Type 8 Light Rail Vehicle ⓘ
surface form:
MBTA Type 8 light rail vehicle
MBTA Type 9 Light Rail Vehicle ⓘ
surface form:
MBTA Type 9 light rail vehicle
|
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.
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.
Subject: Green Line Extension Description of subject: The Green Line Extension is a Massachusetts Bay Transportation Authority light rail project that extends Boston’s Green Line service into previously unserved neighborhoods in Somerville and Medford.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.