BART Fremont line
E423149
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.
All labels observed (4)
| Label | Occurrences |
|---|---|
| BART Fremont line canonical | 1 |
| BART Fremont–Richmond corridor | 1 |
| BART Richmond–Fremont line | 1 |
| BART Richmond–Warm Springs/South Fremont line | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3899795 — 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 Fremont line Context triple: [Fremont station, formerTerminusOf, BART Fremont line]
-
A.
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.
-
B.
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.
-
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.
-
D.
Richmond–Millbrae line
The Richmond–Millbrae line is a Bay Area Rapid Transit (BART) service route in the San Francisco Bay Area that connects Richmond in the East Bay with Millbrae near San Francisco International Airport.
-
E.
BART
BART (Bay Area Rapid Transit) is a major rapid transit system serving the San Francisco Bay Area, linking cities like San Francisco, Oakland, and Berkeley with surrounding suburbs and regional transit networks.
- 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 Fremont line Target entity description: 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.
-
A.
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.
-
B.
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.
-
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.
-
D.
Richmond–Millbrae line
The Richmond–Millbrae line is a Bay Area Rapid Transit (BART) service route in the San Francisco Bay Area that connects Richmond in the East Bay with Millbrae near San Francisco International Airport.
-
E.
BART
BART (Bay Area Rapid Transit) is a major rapid transit system serving the San Francisco Bay Area, linking cities like San Francisco, Oakland, and Berkeley with surrounding suburbs and regional transit networks.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
Bay Area Rapid Transit line
ⓘ
rapid transit line ⓘ |
| connectsTo |
Daly City line
NERFINISHED
ⓘ
Oakland Wye NERFINISHED ⓘ Richmond line NERFINISHED ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| electrification | 1,000 V DC third rail ⓘ |
| fareSystem | distance‑based fares ⓘ |
| historicalRole | original southern Alameda County BART service to Fremont ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Francisco Bay Area ⓘ United States of America ⓘ
surface form:
United States
|
| numberOfTracks | 2 ⓘ |
| operator | Bay Area Rapid Transit NERFINISHED ⓘ |
| owner | San Francisco Bay Area Rapid Transit District NERFINISHED ⓘ |
| partOf |
BART Fremont–Daly City service
NERFINISHED
ⓘ
BART Fremont–Richmond service NERFINISHED ⓘ |
| railwaySignalling | automatic train control ⓘ |
| serves |
Fremont, California
NERFINISHED
ⓘ
southern Alameda County ⓘ |
| servicePattern | all‑stop service ⓘ |
| serviceType | commuter rail transit ⓘ |
| system | Bay Area Rapid Transit NERFINISHED ⓘ |
| terminus | Fremont station NERFINISHED ⓘ |
| trackGauge | 1,676 mm ⓘ |
| usesRollingStock |
BART A car
ⓘ
BART B car NERFINISHED ⓘ BART C car NERFINISHED ⓘ BART D car NERFINISHED ⓘ BART E car 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 Fremont line Description of subject: 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.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
BART Richmond–Fremont line
this entity surface form:
BART Richmond–Warm Springs/South Fremont line
this entity surface form:
BART Fremont–Richmond corridor