Susquehanna River bridge at Havre de Grace
E94439
The Susquehanna River bridge at Havre de Grace is a historic railroad crossing over the Susquehanna River in Maryland that played a key role in 19th-century rail travel along the Northeast Corridor.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Susquehanna River bridge at Havre de Grace canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T508774 — 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: Susquehanna River bridge at Havre de Grace Context triple: [Philadelphia, Wilmington and Baltimore Railroad, notableStructure, Susquehanna River bridge at Havre de Grace]
-
A.
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.
-
B.
Sagamore Bridge
Sagamore Bridge is a major highway bridge in Massachusetts that carries traffic over the Cape Cod Canal, serving as one of the primary gateways to Cape Cod.
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C.
Panhandle Bridge at Pittsburgh
The Panhandle Bridge at Pittsburgh is a historic railroad bridge over the Monongahela River that once carried major Pennsylvania Railroad and successor passenger trains into downtown Pittsburgh.
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D.
Longfellow Bridge
Longfellow Bridge is a historic steel and granite bridge in Boston, Massachusetts, known for carrying road and rail traffic between Boston and Cambridge across the Charles River.
-
E.
Grenville Dodge Memorial Bridge
The Grenville Dodge Memorial Bridge is a major highway bridge in the Omaha–Council Bluffs area that carries Interstate 480 across the Missouri River between Nebraska and Iowa.
- 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: Susquehanna River bridge at Havre de Grace Target entity description: The Susquehanna River bridge at Havre de Grace is a historic railroad crossing over the Susquehanna River in Maryland that played a key role in 19th-century rail travel along the Northeast Corridor.
-
A.
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.
-
B.
Sagamore Bridge
Sagamore Bridge is a major highway bridge in Massachusetts that carries traffic over the Cape Cod Canal, serving as one of the primary gateways to Cape Cod.
-
C.
Panhandle Bridge at Pittsburgh
The Panhandle Bridge at Pittsburgh is a historic railroad bridge over the Monongahela River that once carried major Pennsylvania Railroad and successor passenger trains into downtown Pittsburgh.
-
D.
Longfellow Bridge
Longfellow Bridge is a historic steel and granite bridge in Boston, Massachusetts, known for carrying road and rail traffic between Boston and Cambridge across the Charles River.
-
E.
Grenville Dodge Memorial Bridge
The Grenville Dodge Memorial Bridge is a major highway bridge in the Omaha–Council Bluffs area that carries Interstate 480 across the Missouri River between Nebraska and Iowa.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
railroad bridge
ⓘ
truss bridge ⓘ |
| carries | railroad tracks ⓘ |
| connects |
Havre de Grace, Maryland
ⓘ
Perryville, Maryland ⓘ |
| crosses | Susquehanna River ⓘ |
| function | railroad crossing over the Susquehanna River ⓘ |
| hasFeature |
multiple spans
ⓘ
piers in water ⓘ |
| heritageStatus | historic railroad bridge ⓘ |
| historicalPeriod | 19th century ⓘ |
| locatedIn |
Cecil County, Maryland
ⓘ
Harford County, Maryland ⓘ Havre de Grace, Maryland ⓘ Maryland ⓘ United States of America ⓘ
surface form:
United States
|
| locatedOnWaterway |
Susquehanna River
ⓘ
surface form:
lower Susquehanna River
|
| material | steel ⓘ |
| partOf | Northeast Corridor ⓘ |
| regionServed |
Mid-Atlantic states
ⓘ
surface form:
Mid-Atlantic United States
|
| significance | key role in 19th-century rail travel along the Northeast Corridor ⓘ |
| transportCorridorRole | link between Baltimore and Philadelphia rail lines ⓘ |
| usedBy |
freight trains
ⓘ
passenger trains ⓘ |
| usedFor | rail transport ⓘ |
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: Susquehanna River bridge at Havre de Grace Description of subject: The Susquehanna River bridge at Havre de Grace is a historic railroad crossing over the Susquehanna River in Maryland that played a key role in 19th-century rail travel along the Northeast Corridor.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
Philadelphia, Wilmington and Baltimore Railroad
→
notableStructure
→
Susquehanna River bridge at Havre de Grace
ⓘ