Smithfield Street Bridge
E432351
Smithfield Street Bridge is a historic lenticular truss bridge in Pittsburgh, Pennsylvania, known as one of the oldest steel bridges in the United States and a National Historic Landmark.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Smithfield Street Bridge canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T2825715 — 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: Smithfield Street Bridge Context triple: [Monongahela River, hasBridge, Smithfield Street Bridge]
-
A.
O’Connell Bridge
O’Connell Bridge is a prominent road and pedestrian bridge spanning the River Liffey in central Dublin, known for its unusually wide deck and role as a key city thoroughfare.
-
B.
Stanton Street Bridge
The Stanton Street Bridge is an international bridge that carries vehicular and pedestrian traffic across the U.S.–Mexico border between El Paso, Texas, and Ciudad Juárez, Chihuahua.
-
C.
Henley Street Bridge
Henley Street Bridge is a historic concrete arch bridge spanning the Tennessee River in Knoxville, Tennessee, serving as a key transportation link into the city’s downtown.
-
D.
Church Street Bridge
Church Street Bridge is a historic road bridge in Melbourne, Australia, known for carrying Church Street over the Yarra River and serving as a key local traffic link.
-
E.
Swan Street Bridge
Swan Street Bridge is a prominent road bridge in Melbourne, Australia, carrying traffic over the Yarra River near the Melbourne Cricket Ground and other key sporting precincts.
- 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: Smithfield Street Bridge Target entity description: Smithfield Street Bridge is a historic lenticular truss bridge in Pittsburgh, Pennsylvania, known as one of the oldest steel bridges in the United States and a National Historic Landmark.
-
A.
O’Connell Bridge
O’Connell Bridge is a prominent road and pedestrian bridge spanning the River Liffey in central Dublin, known for its unusually wide deck and role as a key city thoroughfare.
-
B.
Stanton Street Bridge
The Stanton Street Bridge is an international bridge that carries vehicular and pedestrian traffic across the U.S.–Mexico border between El Paso, Texas, and Ciudad Juárez, Chihuahua.
-
C.
Henley Street Bridge
Henley Street Bridge is a historic concrete arch bridge spanning the Tennessee River in Knoxville, Tennessee, serving as a key transportation link into the city’s downtown.
-
D.
Church Street Bridge
Church Street Bridge is a historic road bridge in Melbourne, Australia, known for carrying Church Street over the Yarra River and serving as a key local traffic link.
-
E.
Swan Street Bridge
Swan Street Bridge is a prominent road bridge in Melbourne, Australia, carrying traffic over the Yarra River near the Melbourne Cricket Ground and other key sporting precincts.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
National Historic Landmark
ⓘ
historic bridge ⓘ lenticular truss bridge ⓘ road bridge ⓘ steel bridge ⓘ |
| alsoKnownAs | Smithfield Street Bridge (Monongahela River) NERFINISHED ⓘ |
| carries |
Smithfield Street
NERFINISHED
ⓘ
pedestrian traffic ⓘ vehicular traffic ⓘ |
| city |
Pittsburgh, Pennsylvania
ⓘ
surface form:
Pittsburgh
|
| connects |
Downtown Pittsburgh
NERFINISHED
ⓘ
South Shore of Pittsburgh NERFINISHED ⓘ |
| constructionStart | 1881 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| crosses | Monongahela River NERFINISHED ⓘ |
| crossesAt | Monongahela River at Downtown Pittsburgh NERFINISHED ⓘ |
| design | lenticular truss ⓘ |
| designer | Gustav Lindenthal NERFINISHED ⓘ |
| hasLighting | decorative lighting ⓘ |
| heritageDesignation |
National Historic Landmark
ⓘ
National Register of Historic Places ⓘ
surface form:
National Register of Historic Places listing
|
| length | approximately 1,184 feet ⓘ |
| locatedIn |
Allegheny County, Pennsylvania
NERFINISHED
ⓘ
Pennsylvania ⓘ Pittsburgh, Pennsylvania ⓘ United States of America ⓘ
surface form:
United States
|
| maintainedBy | Pennsylvania Department of Transportation NERFINISHED ⓘ |
| material | steel ⓘ |
| NHLDesignationDate | 1976 ⓘ |
| notableFor |
being one of the oldest steel bridges in the United States
ⓘ
distinctive lenticular truss profile ⓘ |
| NRHPListingDate | 1974 ⓘ |
| numberOfSpans | 3 ⓘ |
| opened | 1883 ⓘ |
| owner | City of Pittsburgh NERFINISHED ⓘ |
| partOf | Pittsburgh bridge network NERFINISHED ⓘ |
| precededBy | wooden covered bridge at same site ⓘ |
| state | Pennsylvania ⓘ |
| trafficType | road traffic ⓘ |
| width | approximately 46 feet ⓘ |
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: Smithfield Street Bridge Description of subject: Smithfield Street Bridge is a historic lenticular truss bridge in Pittsburgh, Pennsylvania, known as one of the oldest steel bridges in the United States and a National Historic Landmark.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.