E branch of Boston’s MBTA Green Line light rail service
E436089
The E branch of Boston’s MBTA Green Line is a light rail route running from downtown Boston through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
All labels observed (1)
| Label | Occurrences |
|---|---|
| E branch of Boston’s MBTA Green Line light rail service canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4392771 — 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: E branch of Boston’s MBTA Green Line light rail service Context triple: [E, isLetterDesignationFor, E branch of Boston’s MBTA Green Line light rail service]
-
A.
Watertown branch of the Green Line A
The Watertown branch of the Green Line A was a former Boston streetcar line that once ran between downtown and Watertown before being permanently converted to bus service.
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B.
Ashmont–Braintree branch of the Red Line
The Ashmont–Braintree branch of the Red Line is a major rapid transit corridor of Boston’s MBTA system, running south from downtown Boston to the suburbs of Ashmont and Braintree.
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C.
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.
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D.
Green Line (MBTA)
The Green Line (MBTA) is Boston’s light rail/streetcar line, serving key neighborhoods and institutions from downtown through areas like Allston, Brookline, and the Longwood Medical Area.
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E.
Green Line B branch
The Green Line B branch is a light rail service of Boston's MBTA Green Line that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton 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: E branch of Boston’s MBTA Green Line light rail service Target entity description: The E branch of Boston’s MBTA Green Line is a light rail route running from downtown Boston through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
-
A.
Watertown branch of the Green Line A
The Watertown branch of the Green Line A was a former Boston streetcar line that once ran between downtown and Watertown before being permanently converted to bus service.
-
B.
Ashmont–Braintree branch of the Red Line
The Ashmont–Braintree branch of the Red Line is a major rapid transit corridor of Boston’s MBTA system, running south from downtown Boston to the suburbs of Ashmont and Braintree.
-
C.
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.
-
D.
Green Line (MBTA)
The Green Line (MBTA) is Boston’s light rail/streetcar line, serving key neighborhoods and institutions from downtown through areas like Allston, Brookline, and the Longwood Medical Area.
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E.
Green Line B branch
The Green Line B branch is a light rail service of Boston's MBTA Green Line that runs along Commonwealth Avenue, primarily serving Boston University and the Allston–Brighton neighborhoods.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
MBTA Green Line branch
ⓘ
light rail line ⓘ |
| color | green ⓘ |
| connectsAt |
Arlington station
NERFINISHED
ⓘ
Boylston station NERFINISHED ⓘ Copley station NERFINISHED ⓘ Government Center station NERFINISHED ⓘ Heath Street station NERFINISHED ⓘ North Station NERFINISHED ⓘ Park Street station NERFINISHED ⓘ Science Park/West End station NERFINISHED ⓘ |
| connectsWith |
MBTA Blue Line
NERFINISHED
ⓘ
MBTA Orange Line NERFINISHED ⓘ MBTA Red Line NERFINISHED ⓘ MBTA commuter rail NERFINISHED ⓘ |
| electrification | overhead catenary ⓘ |
| fareSystem | MBTA fare system ⓘ |
| formerTerminus |
Arborway
NERFINISHED
ⓘ
Lechmere station NERFINISHED ⓘ |
| hasStreetRunningSection | Huntington Avenue NERFINISHED ⓘ |
| lineLetter | E ⓘ |
| locale |
Massachusetts
NERFINISHED
ⓘ
United States NERFINISHED ⓘ |
| mode | light rail ⓘ |
| operator |
MBTA
ⓘ
surface form:
Massachusetts Bay Transportation Authority
|
| partOf | MBTA Green Line NERFINISHED ⓘ |
| runsFrom | downtown Boston ⓘ |
| runsTo | Heath Street in Jamaica Plain NERFINISHED ⓘ |
| servesCity | Boston NERFINISHED ⓘ |
| servesInstitution |
Beth Israel Deaconess Medical Center
NERFINISHED
ⓘ
Boston Children’s Hospital NERFINISHED ⓘ Brigham and Women’s Hospital NERFINISHED ⓘ Harvard Medical School NERFINISHED ⓘ Massachusetts College of Pharmacy and Health Sciences NERFINISHED ⓘ Museum of Fine Arts, Boston NERFINISHED ⓘ Northeastern University NERFINISHED ⓘ Wentworth Institute of Technology NERFINISHED ⓘ |
| servesInstitutionalArea | Longwood Medical and Academic Area NERFINISHED ⓘ |
| servesNeighborhood |
Back Bay
NERFINISHED
ⓘ
Fenway–Kenmore NERFINISHED ⓘ Jamaica Plain NERFINISHED ⓘ Longwood Medical Area NERFINISHED ⓘ Mission Hill NERFINISHED ⓘ |
| system | MBTA subway NERFINISHED ⓘ |
| terminus |
Heath Street station
NERFINISHED
ⓘ
Medford/Tufts station NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
| usesRollingStock |
Type 7 Light Rail Vehicle
NERFINISHED
ⓘ
Type 8 Light Rail Vehicle NERFINISHED ⓘ Type 9 Light Rail Vehicle NERFINISHED ⓘ |
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: E branch of Boston’s MBTA Green Line light rail service Description of subject: The E branch of Boston’s MBTA Green Line is a light rail route running from downtown Boston through the Back Bay and Longwood Medical Area to Heath Street in Jamaica Plain.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.