Dumbarton Bridge
E34544
The Dumbarton Bridge is a major vehicular bridge in the San Francisco Bay Area that provides a key east–west crossing between the Peninsula and the East Bay.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Dumbarton Bridge canonical | 16 |
| Dumbarton Bridge (southern connection) | 1 |
| original Dumbarton Bridge (1927) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T70614 — 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 Context triple: [San Francisco Bay, crossedBy, Dumbarton Bridge]
-
A.
Trinity Bridge
Trinity Bridge is a distinctive three-way footbridge in Greater Manchester, England, designed by architect Santiago Calatrava to link Salford and Manchester across the River Irwell.
-
B.
Wellington Bridge
Wellington Bridge is a roadway bridge in the Boston area that carries traffic across the Mystic River between Medford and Somerville, Massachusetts.
-
C.
Forth Bridge
The Forth Bridge is a historic cantilever railway bridge in Scotland, renowned as an iconic feat of Victorian engineering and a UNESCO World Heritage Site.
-
D.
St. Johns Bridge
St. Johns Bridge is a historic steel suspension bridge in Portland, Oregon, noted for its striking Gothic-style towers and scenic span over the Willamette River.
-
E.
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.
- 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 Target entity description: The Dumbarton Bridge is a major vehicular bridge in the San Francisco Bay Area that provides a key east–west crossing between the Peninsula and the East Bay.
-
A.
Trinity Bridge
Trinity Bridge is a distinctive three-way footbridge in Greater Manchester, England, designed by architect Santiago Calatrava to link Salford and Manchester across the River Irwell.
-
B.
Wellington Bridge
Wellington Bridge is a roadway bridge in the Boston area that carries traffic across the Mystic River between Medford and Somerville, Massachusetts.
-
C.
Forth Bridge
The Forth Bridge is a historic cantilever railway bridge in Scotland, renowned as an iconic feat of Victorian engineering and a UNESCO World Heritage Site.
-
D.
St. Johns Bridge
St. Johns Bridge is a historic steel suspension bridge in Portland, Oregon, noted for its striking Gothic-style towers and scenic span over the Willamette River.
-
E.
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.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf |
bay crossing
ⓘ
highway bridge ⓘ road bridge ⓘ |
| baySegment | southern San Francisco Bay ⓘ |
| carries | California State Route 84 ⓘ |
| connects |
East Bay
ⓘ
Peninsula ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses | San Francisco Bay ⓘ |
| function | vehicular traffic crossing ⓘ |
| hasBicycleAccess | bicycle and pedestrian path on south side (modern span) ⓘ |
| hasLanes | multiple traffic lanes in each direction ⓘ |
| hasPedestrianAccess | no continuous pedestrian walkway ⓘ |
| hasToll | yes ⓘ |
| isMajorCrossingBetween | Peninsula and East Bay ⓘ |
| isOneOf | major east–west crossings of southern San Francisco Bay ⓘ |
| locatedIn | San Francisco Bay Area ⓘ |
| locatedNear |
East Palo Alto, California
ⓘ
Fremont ⓘ
surface form:
Fremont, California
Menlo Park, California ⓘ Newark, California ⓘ |
| maintainedBy |
Caltrans
ⓘ
surface form:
California Department of Transportation
|
| namedAfter | nearby Dumbarton Point ⓘ |
| opened | 1982 ⓘ |
| owner |
California, United States
ⓘ
surface form:
State of California
|
| partOf |
State Route 84
ⓘ
surface form:
State Route 84 corridor
|
| regionServed |
Silicon Valley
ⓘ
southern San Francisco Bay ⓘ |
| replaced | original Dumbarton Bridge ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| structureType | concrete bridge ⓘ |
| tollCollection | electronic toll collection ⓘ |
| tollDirection | westbound ⓘ |
| trafficType | motor vehicles ⓘ |
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 Description of subject: The Dumbarton Bridge is a major vehicular bridge in the San Francisco Bay Area that provides a key east–west crossing between the Peninsula and the East Bay.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Dumbarton Bridge (southern connection)
subject surface form:
Newark, California
subject surface form:
State Route 84 (California)
subject surface form:
State Route 84 (California)
subject surface form:
State Route 84 (California)
this entity surface form:
original Dumbarton Bridge (1927)