Dumbarton Bridge (State Route 84)
E305002
Dumbarton Bridge (State Route 84) is a major highway bridge in the San Francisco Bay Area that carries traffic across the southern end of San Francisco Bay between the Peninsula and the East Bay.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Dumbarton Bridge (State Route 84) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2856301 — 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: Dumbarton Bridge (State Route 84) Context triple: [Facebook (Meta) headquarters, nearTransport, Dumbarton Bridge (State Route 84)]
-
A.
Forth Road Bridge
The Forth Road Bridge is a major suspension bridge in eastern Scotland that carries road traffic across the Firth of Forth, linking Edinburgh to Fife.
-
B.
Tay Road Bridge
Tay Road Bridge is a long road bridge in eastern Scotland that carries vehicular traffic across the Firth of Tay between Dundee and Fife.
-
C.
Macombs Dam Bridge
Macombs Dam Bridge is a historic swing bridge in New York City that connects Manhattan and the Bronx across the Harlem River.
-
D.
Ambridge–Aliquippa Bridge
The Ambridge–Aliquippa Bridge is a historic steel truss bridge spanning the Ohio River in western Pennsylvania, connecting the communities of Ambridge and Aliquippa.
-
E.
Main Street Bridge
Main Street Bridge is a prominent vehicular and pedestrian bridge in downtown Little Rock, Arkansas, spanning the Arkansas River and connecting Little Rock with North Little Rock.
- 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: Dumbarton Bridge (State Route 84) Target entity description: Dumbarton Bridge (State Route 84) is a major highway bridge in the San Francisco Bay Area that carries traffic across the southern end of San Francisco Bay between the Peninsula and the East Bay.
-
A.
Forth Road Bridge
The Forth Road Bridge is a major suspension bridge in eastern Scotland that carries road traffic across the Firth of Forth, linking Edinburgh to Fife.
-
B.
Tay Road Bridge
Tay Road Bridge is a long road bridge in eastern Scotland that carries vehicular traffic across the Firth of Tay between Dundee and Fife.
-
C.
Macombs Dam Bridge
Macombs Dam Bridge is a historic swing bridge in New York City that connects Manhattan and the Bronx across the Harlem River.
-
D.
Ambridge–Aliquippa Bridge
The Ambridge–Aliquippa Bridge is a historic steel truss bridge spanning the Ohio River in western Pennsylvania, connecting the communities of Ambridge and Aliquippa.
-
E.
Main Street Bridge
Main Street Bridge is a prominent vehicular and pedestrian bridge in downtown Little Rock, Arkansas, spanning the Arkansas River and connecting Little Rock with North Little Rock.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
bridge in California
ⓘ
highway bridge ⓘ road bridge ⓘ toll bridge ⓘ |
| approachRoad |
Bayfront Expressway
ⓘ
Thornton Avenue NERFINISHED ⓘ |
| bayCrossingSequence | one of three major east–west highway bridges across San Francisco Bay ⓘ |
| carries | California State Route 84 ⓘ |
| connects |
Alameda County, California
ⓘ
linked to:
Alameda County
East Bay (San Francisco Bay Area) ⓘ
linked to:
East Bay
Peninsula (San Francisco Bay Area) ⓘ
linked to:
San Francisco Peninsula
San Mateo County, California ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | San Francisco Bay ⓘ |
| easternTerminusNear |
Fremont, California
ⓘ
linked to:
Fremont
|
| hasEnvironmentalContext | adjacent to sensitive wetlands at south San Francisco Bay ⓘ |
| hasFeature | bicycle and pedestrian path on south side ⓘ |
| hasStructureType | concrete girder bridge ⓘ |
| hasToll | yes ⓘ |
| hasUse |
bicycle traffic
ⓘ
motor vehicle traffic ⓘ pedestrian traffic ⓘ |
| isLowestCrossingOf | San Francisco Bay ⓘ |
| isMajorCommuterRouteBetween |
East Bay residential areas
ⓘ
Peninsula job centers ⓘ |
| isSouthernmostHighwayCrossingOf | San Francisco Bay ⓘ |
| locatedIn | San Francisco Bay Area ⓘ |
| maintainedBy |
California Department of Transportation
ⓘ
linked to:
Caltrans
Caltrans District 4 ⓘ
linked to:
Caltrans
|
| namedAfter | Dumbarton Point ⓘ |
| near | Don Edwards San Francisco Bay National Wildlife Refuge ⓘ |
| numberOfLanes | 6 ⓘ |
| opened | 1982 ⓘ |
| operatedBy | Bay Area Toll Authority ⓘ |
| owner |
State of California
ⓘ
linked to:
California, United States
|
| parallelTo | Dumbarton Rail Bridge ⓘ |
| partOf |
Bay Area state highway network
ⓘ
linked to:
Bay Area freeway system
California State Route 84 ⓘ |
| regionServed |
Silicon Valley
ⓘ
Tri‑City area of Fremont, Newark, and Union City ⓘ |
| replaced |
original Dumbarton Bridge (1927)
ⓘ
linked to:
Dumbarton Bridge
|
| state |
California
ⓘ
linked to:
California, United States
|
| tollCollectionDirection | westbound only ⓘ |
| tollCollectionMethod | all‑electronic tolling ⓘ |
| tollSystem | FasTrak ⓘ |
| westernTerminusNear |
East Palo Alto, California
ⓘ
Menlo Park, California ⓘ |
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: Dumbarton Bridge (State Route 84) Description of subject: Dumbarton Bridge (State Route 84) is a major highway bridge in the San Francisco Bay Area that carries traffic across the southern end of San Francisco Bay between the Peninsula and the East Bay.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.