BART Silicon Valley extension
E393030
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.
All labels observed (7)
How this entity was disambiguated
This entity first appeared as the object of triple T3835734 — 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 Silicon Valley extension Context triple: [Berryessa/North San José station, partOfLine, BART Silicon Valley extension]
-
A.
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.
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B.
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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C.
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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D.
Sonoma–Marin Area Rail Transit
Sonoma–Marin Area Rail Transit is a commuter rail system in California’s North Bay that provides passenger service along the Highway 101 corridor in Sonoma and Marin counties.
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E.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
- 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 Silicon Valley extension Target entity description: 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.
-
A.
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.
-
B.
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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C.
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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D.
Sonoma–Marin Area Rail Transit
Sonoma–Marin Area Rail Transit is a commuter rail system in California’s North Bay that provides passenger service along the Highway 101 corridor in Sonoma and Marin counties.
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E.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Bay Area Rapid Transit extension
ⓘ
public transit expansion project ⓘ rail infrastructure project ⓘ |
| beneficiary |
Bay Area regional travelers
ⓘ
commuters in Silicon Valley ⓘ residents of Santa Clara County ⓘ |
| connectsFrom |
Alameda County
ⓘ
surface form:
Alameda County, California
|
| connectsTo |
Santa Clara County
ⓘ
surface form:
Santa Clara County, California
|
| connectsWith |
Caltrain
ⓘ
Santa Clara Valley Transportation Authority ⓘ VTA bus network ⓘ VTA light rail ⓘ |
| country | United States of America ⓘ |
| electrification | third rail electrification ⓘ |
| fundedBy |
federal transit grants
ⓘ
local sales tax measures ⓘ state transportation funds ⓘ |
| goal |
integrate regional rail and local transit in Santa Clara County
ⓘ
provide direct BART access to downtown San José ⓘ |
| hasPart |
Berryessa/North San José station
ⓘ
Diridon Station ⓘ
surface form:
Diridon station
San Jose Diridon station ⓘ
surface form:
Downtown San José station
Milpitas station ⓘ Santa Clara station ⓘ |
| includes |
at-grade track segments
ⓘ
elevated track segments ⓘ subway segments in San José ⓘ |
| involves |
construction of new BART stations
ⓘ
construction of new BART track ⓘ |
| locatedIn |
San Francisco Bay Area
ⓘ
San Jose ⓘ
surface form:
San José, California
Santa Clara County ⓘ
surface form:
Santa Clara County, California
|
| modeOfTransport | heavy rail ⓘ |
| operator |
San Francisco Bay Area Rapid Transit District
ⓘ
surface form:
Bay Area Rapid Transit District
|
| partOf |
BART
ⓘ
surface form:
BART system
|
| planningAgency | Santa Clara Valley Transportation Authority ⓘ |
| primaryCityServed |
San Jose
ⓘ
surface form:
San José, California
|
| projectType | multi-phase transit project ⓘ |
| purpose |
extend BART service into Silicon Valley
ⓘ
improve regional transit connectivity ⓘ reduce automobile dependence in Santa Clara County ⓘ |
| railGauge | standard gauge ⓘ |
| regionServed |
Silicon Valley
ⓘ
South Bay ⓘ |
| secondaryCityServed |
Milpitas, California
NERFINISHED
ⓘ
Santa Clara, California, United States ⓘ
surface form:
Santa Clara, California
|
| trackType | grade-separated ⓘ |
| usesRollingStock |
BART
ⓘ
surface form:
BART electric multiple units
|
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 Silicon Valley extension Description of subject: 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.
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Silicon Valley BART Phase I
this entity surface form:
BART Silicon Valley Phase I
this entity surface form:
BART Peninsula extension
this entity surface form:
BART Warm Springs Extension
this entity surface form:
BART Warm Springs Extension
this entity surface form:
BART Peninsula extension
this entity surface form:
BART to Silicon Valley Phase I
this entity surface form:
Silicon Valley BART extension