Market Street subway
E76841
The Market Street subway is a major underground transit corridor in San Francisco that carries both BART and Muni Metro trains beneath Market Street through the city’s downtown.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Market Street subway canonical | 14 |
| Market Street Subway | 7 |
| Market Street transit corridor | 2 |
| Market Street Subway trunk line | 1 |
| Market Street Subway–Surface Tunnel | 1 |
| Market Street transit hub | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T589758 — 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: Market Street subway Context triple: [Central Subway, connectsWith, Market Street subway]
-
A.
Second Avenue Subway
The Second Avenue Subway is a New York City Subway line on Manhattan’s East Side, built to relieve congestion on the Lexington Avenue Line and long envisioned as a major north–south transit corridor.
-
B.
Metro A Line
The Metro A Line is a light rail line in Los Angeles County that runs between downtown Los Angeles and Long Beach as part of the region’s Metro Rail system.
-
C.
Fulton Street Line
The Fulton Street Line is a major New York City Subway corridor in Brooklyn and Manhattan that carries IND services such as the A and C trains along Fulton Street.
-
D.
Park Street station
Park Street station is a major downtown Boston transit hub on the MBTA system, serving multiple Green Line branches and providing connections to the Red Line.
-
E.
Crescent Street station
Crescent Street station is a New York City Subway station in Brooklyn served by the J train.
- 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: Market Street subway Target entity description: The Market Street subway is a major underground transit corridor in San Francisco that carries both BART and Muni Metro trains beneath Market Street through the city’s downtown.
-
A.
Second Avenue Subway
The Second Avenue Subway is a New York City Subway line on Manhattan’s East Side, built to relieve congestion on the Lexington Avenue Line and long envisioned as a major north–south transit corridor.
-
B.
Metro A Line
The Metro A Line is a light rail line in Los Angeles County that runs between downtown Los Angeles and Long Beach as part of the region’s Metro Rail system.
-
C.
Fulton Street Line
The Fulton Street Line is a major New York City Subway corridor in Brooklyn and Manhattan that carries IND services such as the A and C trains along Fulton Street.
-
D.
Park Street station
Park Street station is a major downtown Boston transit hub on the MBTA system, serving multiple Green Line branches and providing connections to the Red Line.
-
E.
Crescent Street station
Crescent Street station is a New York City Subway station in Brooklyn served by the J train.
- F. None of above. chosen
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf |
railway tunnel
ⓘ
rapid transit tunnel ⓘ underground transit corridor ⓘ |
| connectsTo |
Central Subway
ⓘ
Transbay Tube ⓘ Twin Peaks Tunnel ⓘ |
| constructionBegan | 1960s ⓘ |
| designedFor | high-capacity urban rail service ⓘ |
| electrification |
overhead catenary (Muni Metro)
ⓘ
third rail (New York City area) ⓘ
surface form:
third rail (BART)
|
| hasFeature |
shared stations for BART and Muni Metro
ⓘ
two-level tunnel configuration ⓘ |
| hasRole | backbone of downtown San Francisco rail transit ⓘ |
| hasSection |
BART at Montgomery Street station
ⓘ
surface form:
BART upper level
Muni Metro lower level ⓘ |
| hasStation |
Civic Center/UN Plaza station
ⓘ
Embarcadero station ⓘ Montgomery Street station ⓘ Powell Street BART/Muni station ⓘ
surface form:
Powell Street station
|
| hasTrackGauge | standard gauge ⓘ |
| isMajorComponentOf | San Francisco Bay Area transit network ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Francisco ⓘ United States of America ⓘ
surface form:
United States
|
| openedForService | 1970s ⓘ |
| operator |
San Francisco Bay Area Rapid Transit District
ⓘ
surface form:
Bay Area Rapid Transit District
San Francisco Municipal Transportation Agency ⓘ |
| orientation | northeast–southwest along Market Street ⓘ |
| partOf |
BART
ⓘ
surface form:
BART system
San Francisco Muni ⓘ
surface form:
Muni Metro system
|
| primaryFunction | downtown transit corridor ⓘ |
| runsBeneath | Market Street ⓘ |
| runsThrough |
Civic Center area
ⓘ
Financial District (San Francisco) ⓘ
surface form:
San Francisco Financial District
Union Square ⓘ
surface form:
Union Square area
|
| servesSystem |
BART
ⓘ
surface form:
Bay Area Rapid Transit
San Francisco Muni ⓘ
surface form:
Muni Metro
|
| usedBy |
commuter rail passengers
ⓘ
light rail passengers ⓘ |
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: Market Street subway Description of subject: The Market Street subway is a major underground transit corridor in San Francisco that carries both BART and Muni Metro trains beneath Market Street through the city’s downtown.
Referenced by (26)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Market Street Subway–Surface Tunnel
subject surface form:
N Judah
this entity surface form:
Market Street Subway
this entity surface form:
Market Street Subway
this entity surface form:
Market Street Subway
this entity surface form:
Market Street Subway
this entity surface form:
Market Street Subway
Embarcadero Station (BART/Muni Metro nearby terminus area)
→
isLocatedOnCorridor
→
Market Street subway
ⓘ
Embarcadero Station (BART/Muni Metro nearby terminus area)
→
isEasternmostSubwayStationOn
→
Market Street subway
ⓘ
this entity surface form:
Market Street transit hub
this entity surface form:
Market Street transit corridor
this entity surface form:
Market Street transit corridor
this entity surface form:
Market Street Subway
this entity surface form:
Market Street Subway
this entity surface form:
Market Street Subway trunk line
subject surface form:
Powell Street station