San Francisco Central Subway project
E370141
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| San Francisco Central Subway project canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3578904 — 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 Central Subway project Context triple: [Union Square/Market Street station, isPartOfProject, San Francisco Central Subway project]
-
A.
California High-Speed Rail
California High-Speed Rail is a planned statewide high-speed train system in California designed to connect major cities like San Francisco, Los Angeles, and San Diego with fast, electrified rail service.
-
B.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
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C.
Alameda Corridor
The Alameda Corridor is a 20-mile freight rail expressway in Los Angeles County that consolidates and streamlines cargo movement between the region’s ports and the national rail network.
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D.
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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E.
Crenshaw/LAX Transit Project
The Crenshaw/LAX Transit Project is a Los Angeles Metro rail expansion initiative designed to improve transit access along the Crenshaw Corridor and provide a key light rail connection to the Los Angeles International Airport area.
- 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 Central Subway project Target entity description: 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.
-
A.
California High-Speed Rail
California High-Speed Rail is a planned statewide high-speed train system in California designed to connect major cities like San Francisco, Los Angeles, and San Diego with fast, electrified rail service.
-
B.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
-
C.
Alameda Corridor
The Alameda Corridor is a 20-mile freight rail expressway in Los Angeles County that consolidates and streamlines cargo movement between the region’s ports and the national rail network.
-
D.
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.
-
E.
Crenshaw/LAX Transit Project
The Crenshaw/LAX Transit Project is a Los Angeles Metro rail expansion initiative designed to improve transit access along the Crenshaw Corridor and provide a key light rail connection to the Los Angeles International Airport area.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
light rail extension project
ⓘ
public transit infrastructure project ⓘ urban rail transit project ⓘ |
| alignmentType |
subway
ⓘ
underground ⓘ |
| alsoKnownAs | Central Subway ⓘ |
| benefit |
improved regional transit connectivity
ⓘ
improved transit access to Union Square ⓘ increased transit capacity in downtown San Francisco ⓘ reduced travel time between SoMa and Chinatown ⓘ |
| cityGovernmentPartner |
City and County of San Francisco
ⓘ
linked to:
San Francisco County
|
| connectsArea |
Downtown San Francisco
ⓘ
Market Street area ⓘ |
| connectsNeighborhood |
Chinatown
ⓘ
SoMa ⓘ South of Market ⓘ
linked to:
South of Market (SoMa)
Union Square ⓘ Yerba Buena ⓘ |
| constructionMethod |
cut-and-cover
ⓘ
tunnel boring ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| fundingSource |
federal funds
ⓘ
local funds ⓘ state funds ⓘ |
| goal |
enhance transit reliability
ⓘ
reduce congestion on surface streets ⓘ support economic development in connected neighborhoods ⓘ |
| hasComponent |
surface station
ⓘ
tunnels ⓘ underground stations ⓘ |
| hasStation |
4th and Brannan station
ⓘ
Chinatown–Rose Pak station ⓘ Union Square/Market Street station ⓘ Yerba Buena/Moscone station ⓘ |
| infrastructureType | fixed guideway transit ⓘ |
| locatedIn | San Francisco ⓘ |
| mode |
rail
ⓘ
underground light rail ⓘ |
| operator | San Francisco Municipal Transportation Agency ⓘ |
| partOf | Muni Metro ⓘ |
| partOfLine | T Third Street line ⓘ |
| purpose | improve north–south transit connectivity in San Francisco ⓘ |
| railSystemType | light rail ⓘ |
| serves |
commuters
ⓘ
local residents ⓘ tourists ⓘ |
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 Central Subway project Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.