Transbay BART network
E1007336
The Transbay BART network is the portion of the Bay Area Rapid Transit system that carries trains through the Transbay Tube between San Francisco and the East Bay, forming a critical regional rail link under San Francisco Bay.
All labels observed (2)
| Label | Occurrences |
|---|---|
| San Francisco Peninsula (via Transbay Tube connections) | 1 |
| Transbay BART network canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T12785236 — 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: Transbay BART network Context triple: [BART Transbay Zone 1, networkSegment, Transbay BART network]
-
A.
BART Antioch–SFO+Millbrae line
The BART Antioch–SFO+Millbrae line is a Bay Area Rapid Transit service that runs between Antioch in the East Bay and San Francisco International Airport and Millbrae, connecting suburban communities with major regional transit hubs.
-
B.
BART Richmond–Millbrae+SFO line
The BART Richmond–Millbrae+SFO line is a Bay Area Rapid Transit route that runs from Richmond in the East Bay through Oakland and San Francisco to Millbrae and San Francisco International Airport.
-
C.
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.
-
D.
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.
-
E.
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.
- 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: Transbay BART network Target entity description: The Transbay BART network is the portion of the Bay Area Rapid Transit system that carries trains through the Transbay Tube between San Francisco and the East Bay, forming a critical regional rail link under San Francisco Bay.
-
A.
BART Antioch–SFO+Millbrae line
The BART Antioch–SFO+Millbrae line is a Bay Area Rapid Transit service that runs between Antioch in the East Bay and San Francisco International Airport and Millbrae, connecting suburban communities with major regional transit hubs.
-
B.
BART Richmond–Millbrae+SFO line
The BART Richmond–Millbrae+SFO line is a Bay Area Rapid Transit route that runs from Richmond in the East Bay through Oakland and San Francisco to Millbrae and San Francisco International Airport.
-
C.
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.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
public transit infrastructure
ⓘ
rail transport network ⓘ |
| alternativeTo | San Francisco–Oakland Bay Bridge road traffic ⓘ |
| carries | BART passenger trains ⓘ |
| connectsCity | San Francisco ⓘ |
| connectsRegion | East Bay ⓘ |
| connectsToLine |
BART Blue Line (Dublin/Pleasanton–Daly City)
ⓘ
linked to:
BART Blue Line
BART Green Line (Berryessa/North San José–Daly City) ⓘ
linked to:
BART Green Line
BART Orange Line (Richmond–Berryessa/North San José) ⓘ
linked to:
BART Orange Line
BART Red Line (Richmond–Millbrae) ⓘ
linked to:
BART Red Line
BART Yellow Line (Antioch–SFO/Millbrae) ⓘ
linked to:
BART Yellow Line
|
| connectsUnder | San Francisco Bay ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | San Francisco Bay ⓘ |
| electrification | third rail 1000 V DC ⓘ |
| enables | transbay commuting between San Francisco and East Bay ⓘ |
| hasDailyRidershipRole | highest-volume segment of BART ⓘ |
| hasKeyStation |
Embarcadero station
ⓘ
Montgomery Street station ⓘ West Oakland station ⓘ |
| hasSection |
East Bay approach tracks
ⓘ
San Francisco approach tracks ⓘ Transbay Tube ⓘ |
| infrastructureType | subaqueous rail corridor ⓘ |
| isBottleneckFor | BART system capacity ⓘ |
| isCriticalLinkFor |
Bay Area regional transit
ⓘ
linked to:
San Francisco Bay Area transit network
|
| isUnderground | true ⓘ |
| locatedIn | San Francisco Bay Area ⓘ |
| openedWithStructure | Transbay Tube ⓘ |
| openedYearApprox | 1974 ⓘ |
| operatedBy | Bay Area Rapid Transit District ⓘ |
| owner | Bay Area Rapid Transit District ⓘ |
| partOf |
Bay Area Rapid Transit
ⓘ
linked to:
Bay Area Rapid Transit rail network
|
| primaryFunction | regional rail link between San Francisco and East Bay ⓘ |
| safetyConcern | earthquake risk in Bay Area ⓘ |
| safetySystem | automatic train control ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| subjectOf |
capacity expansion studies
ⓘ
second transbay rail crossing proposals ⓘ |
| systemType | heavy rail ⓘ |
| trackGauge |
1676 mm
ⓘ
5 ft 6 in ⓘ |
| usedFor |
commuter rail service
ⓘ
intercity regional travel ⓘ |
| usesStructure | Transbay Tube ⓘ |
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: Transbay BART network Description of subject: The Transbay BART network is the portion of the Bay Area Rapid Transit system that carries trains through the Transbay Tube between San Francisco and the East Bay, forming a critical regional rail link under San Francisco Bay.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Transbay BART network