San Francisco International Airport AirTrain system
E392455
The San Francisco International Airport AirTrain system is an automated people mover that transports passengers between airport terminals, parking garages, rental car facilities, and the Bay Area Rapid Transit (BART) station at SFO.
All labels observed (2)
| Label | Occurrences |
|---|---|
| AirTrain (San Francisco International Airport) | 1 |
| San Francisco International Airport AirTrain system canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3843875 — 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: San Francisco International Airport AirTrain system Context triple: [San Francisco International Airport station, connectedTo, San Francisco International Airport AirTrain system]
-
A.
San Francisco International Airport station
San Francisco International Airport station is a Bay Area Rapid Transit (BART) rail station that directly serves San Francisco International Airport, providing regional transit connections for air travelers.
-
B.
San Francisco cable car system
The San Francisco cable car system is a historic manually operated streetcar network and iconic symbol of the city, known for its steep routes and status as the world’s last permanently operational cable car system.
-
C.
San Francisco Muni
San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
-
D.
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.
-
E.
Golden Gate Transit
Golden Gate Transit is a regional public bus and ferry system serving the North Bay and San Francisco in California.
- 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: San Francisco International Airport AirTrain system Target entity description: The San Francisco International Airport AirTrain system is an automated people mover that transports passengers between airport terminals, parking garages, rental car facilities, and the Bay Area Rapid Transit (BART) station at SFO.
-
A.
San Francisco International Airport station
San Francisco International Airport station is a Bay Area Rapid Transit (BART) rail station that directly serves San Francisco International Airport, providing regional transit connections for air travelers.
-
B.
San Francisco cable car system
The San Francisco cable car system is a historic manually operated streetcar network and iconic symbol of the city, known for its steep routes and status as the world’s last permanently operational cable car system.
-
C.
San Francisco Muni
San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
-
D.
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.
-
E.
Golden Gate Transit
Golden Gate Transit is a regional public bus and ferry system serving the North Bay and San Francisco in California.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
airport people mover
ⓘ
automated people mover system ⓘ |
| category |
Airport rail link in the United States
ⓘ
Transport infrastructure in the San Francisco Bay Area ⓘ |
| connectsWith |
BART
ⓘ
surface form:
Bay Area Rapid Transit
San Francisco International Airport station ⓘ
surface form:
SFO BART station
|
| designedFor |
airline passengers
ⓘ
airport employees ⓘ |
| environmentalBenefit |
reduces emissions from shuttle buses
ⓘ
reduces internal airport vehicle traffic ⓘ |
| farePolicy | free to ride ⓘ |
| hasAccessibilityFeature |
elevator connections at stations
ⓘ
escalator connections at stations ⓘ wheelchair accessible ⓘ |
| hasLine |
Blue Line
ⓘ
Red Line ⓘ |
| hasStation |
BART station at SFO
ⓘ
Garage A station ⓘ Garage G station ⓘ International Terminal station ⓘ Long-Term Parking station ⓘ Rental Car Center station ⓘ Terminal 1 station ⓘ Terminal 2 station ⓘ Terminal 3 station ⓘ |
| isPartOf | infrastructure of San Francisco International Airport ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Francisco International Airport ⓘ San Mateo County, California ⓘ United States of America ⓘ
surface form:
United States
|
| operates | 24 hours a day ⓘ |
| operator | San Francisco International Airport ⓘ |
| owner |
San Francisco County
ⓘ
surface form:
City and County of San Francisco
|
| primaryFunction |
connection to BART station
ⓘ
connection to rental car center ⓘ inter-terminal passenger transport ⓘ |
| propulsionType | electric ⓘ |
| safetyFeature |
automated train control
ⓘ
platform edge doors at some stations ⓘ |
| serves | San Francisco International Airport ⓘ |
| servesFacility |
SFO International Terminal
ⓘ
SFO Rental Car Center ⓘ San Francisco International Airport ⓘ
surface form:
SFO domestic terminals
SFO long-term parking ⓘ |
| transportsBetween |
San Francisco International Airport station
ⓘ
surface form:
Bay Area Rapid Transit station at SFO
airport parking garages at SFO ⓘ airport terminals at SFO ⓘ rental car facilities at SFO ⓘ |
| usesTechnology | automated guideway transit ⓘ |
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: San Francisco International Airport AirTrain system Description of subject: The San Francisco International Airport AirTrain system is an automated people mover that transports passengers between airport terminals, parking garages, rental car facilities, and the Bay Area Rapid Transit (BART) station at SFO.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
San Francisco International Airport station
→
connectedTo
→
San Francisco International Airport AirTrain system
ⓘ
subject surface form:
Terminal 3 (San Francisco International Airport)
this entity surface form:
AirTrain (San Francisco International Airport)