Long Bridge
E35960
Long Bridge is a major railroad bridge over the Potomac River in Washington, D.C., carrying freight and passenger trains between the District of Columbia and Virginia.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Long Bridge canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T90884 — 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: Long Bridge Context triple: [14th Street Bridge complex, hasPart, Long 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.
Dumbarton Bridge
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.
-
C.
Wellington Bridge
Wellington Bridge is a roadway bridge in the Boston area that carries traffic across the Mystic River between Medford and Somerville, Massachusetts.
-
D.
Adelphi Footbridge
Adelphi Footbridge is a pedestrian bridge spanning the River Irwell in Salford, England, providing a crossing between key areas of the city.
-
E.
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.
- 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: Long Bridge Target entity description: Long Bridge is a major railroad bridge over the Potomac River in Washington, D.C., carrying freight and passenger trains between the District of Columbia and Virginia.
-
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.
Dumbarton Bridge
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.
-
C.
Wellington Bridge
Wellington Bridge is a roadway bridge in the Boston area that carries traffic across the Mystic River between Medford and Somerville, Massachusetts.
-
D.
Adelphi Footbridge
Adelphi Footbridge is a pedestrian bridge spanning the River Irwell in Salford, England, providing a crossing between key areas of the city.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
railroad bridge
ⓘ
truss bridge ⓘ |
| approachLocation |
Arlington, Virginia
ⓘ
Southwest Washington, D.C. ⓘ |
| carries |
freight trains
ⓘ
passenger trains ⓘ |
| connects |
District of Columbia
ⓘ
Virginia ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | Potomac River ⓘ |
| deckType | deck truss ⓘ |
| function | rail transportation corridor between Washington, D.C. and Virginia ⓘ |
| hasHistoricalPrecursor |
Long Bridge (1809 wooden bridge)
ⓘ
Long Bridge (Civil War-era structure) ⓘ |
| hasNameOrigin | named for its original long wooden structure across Potomac flats ⓘ |
| hasNavigationClearance | fixed-span bridge with limited vertical clearance for river traffic ⓘ |
| hasUpgradePlan | Long Bridge expansion project between D.C. and Virginia ⓘ |
| locatedIn | Washington, D.C. ⓘ |
| maintainedBy | CSX Transportation ⓘ |
| near |
L’Enfant Plaza
ⓘ
The Pentagon ⓘ
linked to:
Pentagon
|
| numberOfTracks | 2 ⓘ |
| opened | 1904 ⓘ |
| ownedBy | CSX Transportation ⓘ |
| parallelTo |
14th Street Bridge complex
ⓘ
Arlington Memorial Bridge ⓘ
linked to:
Memorial Bridge
|
| partOf |
CSX Transportation RF&P Subdivision
ⓘ
linked to:
CSX RF&P Subdivision
Northeast Corridor freight and passenger route ⓘ
linked to:
Northeast Corridor
|
| passesNear |
East Potomac Park
ⓘ
Long Bridge Park, Arlington ⓘ |
| plannedAdditionalTracks | 2 ⓘ |
| plannedPurpose | increase rail capacity over the Potomac River ⓘ |
| railLine | former Richmond, Fredericksburg and Potomac Railroad route ⓘ |
| regionServed |
Mid-Atlantic United States
ⓘ
linked to:
Mid-Atlantic states
|
| replaced | earlier Long Bridge structures dating to the 19th century ⓘ |
| riverMile | approximately Potomac River mile 110 ⓘ |
| significance | primary rail crossing of the Potomac River for Washington, D.C. ⓘ |
| strategicRole | critical bottleneck in Washington-area rail network ⓘ |
| structureType | steel truss ⓘ |
| usedBy |
Amtrak
ⓘ
CSX Transportation ⓘ Virginia Railway Express ⓘ |
| usedDuring | American Civil War ⓘ |
| usedFor |
commuter rail
ⓘ
freight rail ⓘ intercity passenger rail ⓘ |
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: Long Bridge Description of subject: Long Bridge is a major railroad bridge over the Potomac River in Washington, D.C., carrying freight and passenger trains between the District of Columbia and Virginia.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.