Long Bridge (Civil War-era structure)
E187437
Long Bridge (Civil War-era structure) was a strategically vital Potomac River crossing near Washington, D.C., heavily used and fortified by Union forces during the American Civil War.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Long Bridge (Civil War-era structure) canonical | 1 |
| Long Bridge over the Potomac River (via connecting trackage) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1663506 — 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 (Civil War-era structure) Context triple: [Long Bridge, hasHistoricalPrecursor, Long Bridge (Civil War-era structure)]
-
A.
High Bridge
High Bridge is a historic medieval stone bridge in Lincoln, Lincolnshire, notable as one of the oldest bridges in the United Kingdom still used by traffic and lined with buildings.
-
B.
Wells Street Bridge
Wells Street Bridge is a historic double-deck, double-leaf bascule bridge in downtown Chicago that carries both road traffic and elevated trains across the Chicago River.
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C.
Mystic River Bridge
The Mystic River Bridge, officially known as the Maurice J. Tobin Memorial Bridge, is a major steel cantilever roadway bridge in Boston, Massachusetts, carrying U.S. Route 1 over the Mystic River between Charlestown and Chelsea.
-
D.
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.
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E.
Memorial Bridge
Memorial Bridge is a prominent ceremonial bridge spanning the Potomac River, symbolically linking Arlington National Cemetery with the Lincoln Memorial in Washington, D.C.
- 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 (Civil War-era structure) Target entity description: Long Bridge (Civil War-era structure) was a strategically vital Potomac River crossing near Washington, D.C., heavily used and fortified by Union forces during the American Civil War.
-
A.
High Bridge
High Bridge is a historic medieval stone bridge in Lincoln, Lincolnshire, notable as one of the oldest bridges in the United Kingdom still used by traffic and lined with buildings.
-
B.
Wells Street Bridge
Wells Street Bridge is a historic double-deck, double-leaf bascule bridge in downtown Chicago that carries both road traffic and elevated trains across the Chicago River.
-
C.
Mystic River Bridge
The Mystic River Bridge, officially known as the Maurice J. Tobin Memorial Bridge, is a major steel cantilever roadway bridge in Boston, Massachusetts, carrying U.S. Route 1 over the Mystic River between Charlestown and Chelsea.
-
D.
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.
-
E.
Memorial Bridge
Memorial Bridge is a prominent ceremonial bridge spanning the Potomac River, symbolically linking Arlington National Cemetery with the Lincoln Memorial in Washington, D.C.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
bridge
ⓘ
transportation infrastructure ⓘ |
| accessControlledBy | Union military authorities ⓘ |
| associatedWithEvent |
Union occupation of Northern Virginia
ⓘ
defense of Washington during the American Civil War ⓘ |
| connects |
Virginia
ⓘ
Washington, D.C. ⓘ |
| controlledBy | Union forces ⓘ |
| crosses | Potomac River ⓘ |
| fortifiedBy | Union Army ⓘ |
| function |
military transportation route
ⓘ
supply route for Union Army ⓘ troop movement route ⓘ |
| guardedBy | Union troops ⓘ |
| hasNearbyFortification |
fortifications on the Virginia side
ⓘ
fortifications on the Washington, D.C. side ⓘ |
| heavilyUsedBy | Union military ⓘ |
| heritageStatus | no longer exists in its Civil War-era form ⓘ |
| historicalEra | 19th century ⓘ |
| historicalSignificance |
important element of Union control over the Potomac River crossings near Washington
ⓘ
key logistical link between the national capital and Virginia battlefields ⓘ |
| importanceTo |
Army of the Potomac
ⓘ
surface form:
Union Army of the Potomac
United States Department of War ⓘ
surface form:
United States War Department
|
| locatedIn |
District of Columbia
ⓘ
United States of America ⓘ
surface form:
United States
|
| locatedNear | Washington, D.C. ⓘ |
| militaryRole |
secured key approach to the national capital from the south
ⓘ
served as primary Union crossing of the lower Potomac near Washington ⓘ |
| nearbyCity | Alexandria, Virginia ⓘ |
| nearbyFeature | Arlington, Virginia ⓘ |
| partOf |
Union supply line between Washington and Virginia battlefronts
ⓘ
defenses of Washington, D.C. ⓘ |
| relatedTo | modern Long Bridge over the Potomac River ⓘ |
| statusDuringWar |
subject to strict military control
ⓘ
under continuous military guard ⓘ |
| strategicImportance | vital Potomac River crossing for defense of Washington, D.C. ⓘ |
| threatenedBy | Confederate forces ⓘ |
| usedBy |
Union government officials
ⓘ
military couriers ⓘ military engineers ⓘ |
| usedDuring | American Civil War ⓘ |
| usedFor |
movement of artillery
ⓘ
movement of military supplies ⓘ pedestrian traffic ⓘ rail traffic ⓘ wagon traffic ⓘ |
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 (Civil War-era structure) Description of subject: Long Bridge (Civil War-era structure) was a strategically vital Potomac River crossing near Washington, D.C., heavily used and fortified by Union forces during the American Civil War.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Long Bridge over the Potomac River (via connecting trackage)