BART Blue Line
E582310
The BART Blue Line is a Bay Area Rapid Transit service route that runs through San Francisco and the greater Bay Area, connecting key urban centers and regional destinations.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T6046761 — 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: BART Blue Line Context triple: [Civic Center/UN Plaza station, hasService, BART Blue Line]
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A.
BART Green Line
The BART Green Line is a Bay Area Rapid Transit service route that operates trains through the South Bay, including stops such as Berryessa/North San José station.
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B.
BART Orange Line
The BART Orange Line is a Bay Area Rapid Transit service route that runs through the East Bay and South Bay, connecting cities such as Richmond, Oakland, and San José.
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C.
BART Red Line
The BART Red Line is a Bay Area Rapid Transit service route that runs through San Francisco and connects key destinations including downtown San Francisco, Oakland, and other parts of the Bay Area.
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D.
BART Yellow Line
The BART Yellow Line is a Bay Area Rapid Transit route that runs through key stations including Civic Center/UN Plaza, connecting San Francisco with the East Bay and beyond.
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E.
BART Fremont line
The BART Fremont line is a Bay Area Rapid Transit route in the San Francisco Bay Area that historically extended service to the city of Fremont in southern Alameda County.
- 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: BART Blue Line Target entity description: The BART Blue Line is a Bay Area Rapid Transit service route that runs through San Francisco and the greater Bay Area, connecting key urban centers and regional destinations.
-
A.
BART Green Line
The BART Green Line is a Bay Area Rapid Transit service route that operates trains through the South Bay, including stops such as Berryessa/North San José station.
-
B.
BART Orange Line
The BART Orange Line is a Bay Area Rapid Transit service route that runs through the East Bay and South Bay, connecting cities such as Richmond, Oakland, and San José.
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C.
BART Red Line
The BART Red Line is a Bay Area Rapid Transit service route that runs through San Francisco and connects key destinations including downtown San Francisco, Oakland, and other parts of the Bay Area.
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D.
BART Yellow Line
The BART Yellow Line is a Bay Area Rapid Transit route that runs through key stations including Civic Center/UN Plaza, connecting San Francisco with the East Bay and beyond.
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E.
BART Fremont line
The BART Fremont line is a Bay Area Rapid Transit route in the San Francisco Bay Area that historically extended service to the city of Fremont in southern Alameda County.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
BART service route
ⓘ
rapid transit service ⓘ |
| connectsKeyDestinations |
downtown Oakland
ⓘ
downtown San Francisco ⓘ regional employment centers ⓘ residential suburbs ⓘ |
| connectsTo |
AC Transit
NERFINISHED
ⓘ
BART Green Line NERFINISHED ⓘ BART Orange Line NERFINISHED ⓘ BART Red Line NERFINISHED ⓘ BART Yellow Line NERFINISHED ⓘ Caltrain NERFINISHED ⓘ Golden Gate Transit NERFINISHED ⓘ SamTrans NERFINISHED ⓘ San Francisco Municipal Railway (Muni) NERFINISHED ⓘ VTA NERFINISHED ⓘ regional bus services ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | third rail ⓘ |
| fareMedium |
Clipper card
NERFINISHED
ⓘ
paper ticket (legacy/limited use) ⓘ |
| fareSystem | distance-based fare ⓘ |
| hasFeature |
accessible stations
ⓘ
automated train control ⓘ bicycle access (varies by station) ⓘ high-platform stations ⓘ |
| locatedIn | San Francisco Bay Area ⓘ |
| mode | rail ⓘ |
| operator | Bay Area Rapid Transit NERFINISHED ⓘ |
| owner | Bay Area Rapid Transit District NERFINISHED ⓘ |
| partOfNetwork | Bay Area Rapid Transit system NERFINISHED ⓘ |
| publicTransportSystem | BART NERFINISHED ⓘ |
| servesCity |
Berkeley
NERFINISHED
ⓘ
Daly City NERFINISHED ⓘ Millbrae NERFINISHED ⓘ Oakland NERFINISHED ⓘ San Bruno NERFINISHED ⓘ San Francisco NERFINISHED ⓘ San Mateo NERFINISHED ⓘ South San Francisco NERFINISHED ⓘ |
| servesFunction |
commuter transport
ⓘ
regional connectivity ⓘ |
| servesRegion |
East Bay
NERFINISHED
ⓘ
San Francisco Peninsula NERFINISHED ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| trackGauge | broad gauge ⓘ |
| transitType | heavy rail ⓘ |
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: BART Blue Line Description of subject: The BART Blue Line is a Bay Area Rapid Transit service route that runs through San Francisco and the greater Bay Area, connecting key urban centers and regional destinations.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Civic Center/UN Plaza station
this entity surface form:
BART Blue Line (Dublin/Pleasanton–Daly City) via Bay Fair (historical/peak patterns may vary)
this entity surface form:
BART Blue Line (Dublin/Pleasanton–Daly City)
this entity surface form:
BART Blue Line (Dublin/Pleasanton–Daly City)
this entity surface form:
BART Blue Line (Dublin/Pleasanton–Daly City) via branch