Yerba Buena Tunnel
E108102
Yerba Buena Tunnel is a vehicular tunnel in the San Francisco Bay that carries the San Francisco–Oakland Bay Bridge through Yerba Buena Island, connecting its eastern and western spans.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Yerba Buena Tunnel canonical | 2 |
| Bay Bridge Yerba Buena Tunnel | 1 |
| Yerba Buena Island tunnel | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T882372 — 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: Yerba Buena Tunnel Context triple: [Yerba Buena Island, hasTunnel, Yerba Buena Tunnel]
-
A.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
-
B.
Midtown Tunnel
The Midtown Tunnel is a vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
C.
Downtown Tunnel
The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
D.
Amador Causeway
Amador Causeway is a scenic coastal roadway and recreational area in Panama City that connects the mainland to several Pacific islands and offers views of the Panama Canal and city skyline.
-
E.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
- 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: Yerba Buena Tunnel Target entity description: Yerba Buena Tunnel is a vehicular tunnel in the San Francisco Bay that carries the San Francisco–Oakland Bay Bridge through Yerba Buena Island, connecting its eastern and western spans.
-
A.
Transbay Tube
The Transbay Tube is an underwater rail tunnel beneath San Francisco Bay that carries BART trains between San Francisco and Oakland.
-
B.
Midtown Tunnel
The Midtown Tunnel is a vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
C.
Downtown Tunnel
The Downtown Tunnel is a major underwater vehicular tunnel in the Hampton Roads region that carries traffic beneath the Elizabeth River between Norfolk and Portsmouth, Virginia.
-
D.
Amador Causeway
Amador Causeway is a scenic coastal roadway and recreational area in Panama City that connects the mainland to several Pacific islands and offers views of the Panama Canal and city skyline.
-
E.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
road tunnel
ⓘ
vehicular tunnel ⓘ |
| adjacentTo |
San Francisco–Oakland Bay Bridge eastern span
ⓘ
linked to:
San Francisco–Oakland Bay Bridge
San Francisco–Oakland Bay Bridge western span ⓘ
linked to:
San Francisco–Oakland Bay Bridge
|
| carries |
Interstate 80
ⓘ
San Francisco–Oakland Bay Bridge traffic ⓘ motor vehicle traffic ⓘ |
| connects |
eastern span of the San Francisco–Oakland Bay Bridge
ⓘ
linked to:
San Francisco–Oakland Bay Bridge
western span of the San Francisco–Oakland Bay Bridge ⓘ |
| constructionStartDate | 1933 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | Yerba Buena Island ⓘ |
| hasDeckConfiguration | stacked decks ⓘ |
| hasLowerDeck | eastbound traffic ⓘ |
| hasPortal |
east portal on Yerba Buena Island
ⓘ
west portal on Yerba Buena Island ⓘ |
| hasSignificance | key link between San Francisco and East Bay ⓘ |
| hasStructureType | bored tunnel ⓘ |
| hasToll | yes, as part of the Bay Bridge toll system ⓘ |
| hasTrafficDirection | bidirectional ⓘ |
| hasUpperDeck | westbound traffic ⓘ |
| length |
about 1,780 feet
ⓘ
about 540 meters ⓘ |
| locatedIn |
San Francisco Bay
ⓘ
Yerba Buena Island ⓘ |
| locatedInBodyOfWater | San Francisco Bay ⓘ |
| locatedInCounty |
Alameda County
ⓘ
San Francisco County ⓘ |
| maintainedBy |
California Department of Transportation
ⓘ
linked to:
Caltrans
|
| numberOfDecks | 2 ⓘ |
| numberOfLanes |
5 lanes lower deck
ⓘ
5 lanes upper deck ⓘ |
| openingDate | 1936 ⓘ |
| owner |
State of California
ⓘ
linked to:
California, United States
|
| partOf | San Francisco–Oakland Bay Bridge ⓘ |
| partOfNetwork | Bay Area freeway system ⓘ |
| partOfRoute | transcontinental Interstate 80 corridor ⓘ |
| safetyFeature |
fire protection systems
ⓘ
lighting system ⓘ ventilation system ⓘ |
| servesCity |
Oakland
ⓘ
San Francisco ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| usedFor |
commuter traffic
ⓘ
freight traffic ⓘ |
| width |
about 24 meters
ⓘ
about 79 feet ⓘ |
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: Yerba Buena Tunnel Description of subject: Yerba Buena Tunnel is a vehicular tunnel in the San Francisco Bay that carries the San Francisco–Oakland Bay Bridge through Yerba Buena Island, connecting its eastern and western spans.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Yerba Buena Tunnel
linked to: Yerba Buena Tunnel