John P. Grace Memorial Bridge
E527718
The John P. Grace Memorial Bridge was a cantilever truss bridge in Charleston, South Carolina, that carried U.S. Route 17 and served as a primary crossing between Charleston and Mount Pleasant for much of the 20th century.
All labels observed (2)
| Label | Occurrences |
|---|---|
| John P. Grace Memorial Bridge canonical | 2 |
| Silas N. Pearman Bridge | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3686610 — 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: John P. Grace Memorial Bridge Context triple: [Cooper River, crossedBy, John P. Grace Memorial Bridge]
-
A.
Glenn L. Jackson Memorial Bridge
The Glenn L. Jackson Memorial Bridge is a major concrete segmental bridge carrying traffic across the Columbia River between Oregon and Washington as part of the Portland metropolitan highway system.
-
B.
Harry W. Nice Memorial Bridge
The Harry W. Nice Memorial Bridge is a major highway bridge carrying U.S. Route 301 across the Potomac River between Maryland and Virginia.
-
C.
Homer M. Hadley Memorial Bridge
The Homer M. Hadley Memorial Bridge is a major floating bridge in Washington State that carries Interstate 90 across Lake Washington between Seattle and Mercer Island.
-
D.
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.
-
E.
James B. Edwards Bridge
The James B. Edwards Bridge is a major highway span in South Carolina that carries Interstate 526 over the Cooper River, connecting the Charleston area’s road network.
- 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: John P. Grace Memorial Bridge Target entity description: The John P. Grace Memorial Bridge was a cantilever truss bridge in Charleston, South Carolina, that carried U.S. Route 17 and served as a primary crossing between Charleston and Mount Pleasant for much of the 20th century.
-
A.
Glenn L. Jackson Memorial Bridge
The Glenn L. Jackson Memorial Bridge is a major concrete segmental bridge carrying traffic across the Columbia River between Oregon and Washington as part of the Portland metropolitan highway system.
-
B.
Harry W. Nice Memorial Bridge
The Harry W. Nice Memorial Bridge is a major highway bridge carrying U.S. Route 301 across the Potomac River between Maryland and Virginia.
-
C.
Homer M. Hadley Memorial Bridge
The Homer M. Hadley Memorial Bridge is a major floating bridge in Washington State that carries Interstate 90 across Lake Washington between Seattle and Mercer Island.
-
D.
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.
-
E.
James B. Edwards Bridge
The James B. Edwards Bridge is a major highway span in South Carolina that carries Interstate 526 over the Cooper River, connecting the Charleston area’s road network.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
cantilever truss bridge
ⓘ
road bridge ⓘ |
| alsoKnownAs | Grace Bridge ⓘ |
| carries | U.S. Route 17 ⓘ |
| connects |
Charleston, South Carolina
ⓘ
Mount Pleasant, South Carolina ⓘ |
| constructionStart | 1927 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| crosses | Cooper River ⓘ |
| demolished | 2005 ⓘ |
| design | cantilever truss ⓘ |
| function | vehicular traffic ⓘ |
| hasHeritage | 20th-century American bridge engineering ⓘ |
| historicUse | major regional transportation link ⓘ |
| locatedIn | Charleston, South Carolina ⓘ |
| locatedInMetropolitanArea | Charleston metropolitan area ⓘ |
| maintainedBy | South Carolina Department of Transportation ⓘ |
| material | steel ⓘ |
| namedAfter | John P. Grace ⓘ |
| notableFor | being one of the earliest major Cooper River crossings ⓘ |
| opened | 1929 ⓘ |
| partOf | primary crossing between Charleston and Mount Pleasant in the 20th century ⓘ |
| regionServed | Lowcountry of South Carolina ⓘ |
| replacedBy |
Arthur Ravenel Jr. Bridge
ⓘ
linked to:
Ravenel Bridge
|
| replacedStructure | ferry service across the Cooper River ⓘ |
| servedAs | primary crossing of the Cooper River between Charleston and Mount Pleasant ⓘ |
| state | South Carolina ⓘ |
| status | demolished structure ⓘ |
| trafficType |
automobile
ⓘ
truck ⓘ |
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: John P. Grace Memorial Bridge Description of subject: The John P. Grace Memorial Bridge was a cantilever truss bridge in Charleston, South Carolina, that carried U.S. Route 17 and served as a primary crossing between Charleston and Mount Pleasant for much of the 20th century.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: John P. Grace Memorial Bridge