BART Antioch extension corridor
E627702
The BART Antioch extension corridor is the transit infrastructure corridor in eastern Contra Costa County that carries BART’s eBART service between Pittsburg/Bay Point and Antioch as part of the broader Antioch extension project.
All labels observed (1)
| Label | Occurrences |
|---|---|
| BART Antioch extension corridor canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6896521 — 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 Antioch extension corridor Context triple: [BART Antioch–SFO+Millbrae line, partOf, BART Antioch extension corridor]
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A.
BART Silicon Valley extension
The BART Silicon Valley extension is a major Bay Area Rapid Transit project extending rail service into Santa Clara County, including new stations in San José and surrounding areas.
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B.
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.
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C.
Altamont Corridor Express
Altamont Corridor Express is a commuter rail service in Northern California that connects Central Valley communities with the San Francisco Bay Area.
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D.
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.
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E.
San Francisco Central Subway project
The San Francisco Central Subway project is a major Muni Metro light rail extension in San Francisco designed to improve north–south transit connectivity by linking neighborhoods such as SoMa, Union Square, and Chinatown.
- 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 Antioch extension corridor Target entity description: The BART Antioch extension corridor is the transit infrastructure corridor in eastern Contra Costa County that carries BART’s eBART service between Pittsburg/Bay Point and Antioch as part of the broader Antioch extension project.
-
A.
BART Silicon Valley extension
The BART Silicon Valley extension is a major Bay Area Rapid Transit project extending rail service into Santa Clara County, including new stations in San José and surrounding areas.
-
B.
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.
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C.
Altamont Corridor Express
Altamont Corridor Express is a commuter rail service in Northern California that connects Central Valley communities with the San Francisco Bay Area.
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D.
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.
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E.
San Francisco Central Subway project
The San Francisco Central Subway project is a major Muni Metro light rail extension in San Francisco designed to improve north–south transit connectivity by linking neighborhoods such as SoMa, Union Square, and Chinatown.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
rail transit corridor
ⓘ
transit infrastructure corridor ⓘ |
| alignmentRoughlyParallels | California State Route 4 NERFINISHED ⓘ |
| connects |
Antioch
NERFINISHED
ⓘ
Pittsburg/Bay Point NERFINISHED ⓘ |
| corridorFor | Antioch–SFO/Millbrae line (via transfer at Pittsburg/Bay Point) NERFINISHED ⓘ |
| corridorNameUsedBy |
BART planning documents
ⓘ
Contra Costa Transportation Authority planning documents ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | diesel multiple unit operation (non-electrified mainline) ⓘ |
| environmentalReviewFor | BART Antioch extension project NERFINISHED ⓘ |
| formsPartOf | BART system NERFINISHED ⓘ |
| fundingProgram | BART Antioch extension funding package ⓘ |
| hasTerminus |
Antioch Station
NERFINISHED
ⓘ
Pittsburg/Bay Point transfer platform NERFINISHED ⓘ |
| infrastructureType | double-track rail corridor (in most segments) ⓘ |
| isInfrastructureFor | BART eBART line NERFINISHED ⓘ |
| isSegmentOf | East County rail corridor NERFINISHED ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Contra Costa County, California NERFINISHED ⓘ United States of America ⓘ
surface form:
United States
eastern Contra Costa County ⓘ |
| modeIntegration | connects with conventional BART at Pittsburg/Bay Point ⓘ |
| openedAsPartOf | BART Antioch extension opening ⓘ |
| operator | Bay Area Rapid Transit District NERFINISHED ⓘ |
| ownedBy | Bay Area Rapid Transit District NERFINISHED ⓘ |
| partOf | BART Antioch extension project NERFINISHED ⓘ |
| planningAgency |
Bay Area Rapid Transit District
NERFINISHED
ⓘ
Contra Costa Transportation Authority NERFINISHED ⓘ |
| primaryMode | diesel multiple unit ⓘ |
| purpose |
to extend BART service east of Pittsburg/Bay Point
ⓘ
to provide higher-capacity transit in the State Route 4 corridor ⓘ |
| railGauge | standard gauge ⓘ |
| regionServed | San Francisco Bay Area ⓘ |
| safetySystem | signalized mainline railroad operations ⓘ |
| servesCity |
Antioch, California
NERFINISHED
ⓘ
Pittsburg, California NERFINISHED ⓘ |
| servesCommutersFrom | Brentwood area (via feeder services) ⓘ |
| servesRegion | East Contra Costa County NERFINISHED ⓘ |
| serviceType |
commuter rail
ⓘ
regional rail ⓘ |
| status | in operation ⓘ |
| usedBy | BART eBART service 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: BART Antioch extension corridor Description of subject: The BART Antioch extension corridor is the transit infrastructure corridor in eastern Contra Costa County that carries BART’s eBART service between Pittsburg/Bay Point and Antioch as part of the broader Antioch extension project.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.