Seongsu Bridge
E666245
Seongsu Bridge is a major road bridge in Seoul, South Korea, known both for its role in connecting districts across the Han River and for its infamous 1994 collapse and subsequent reconstruction.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Seongsu Bridge canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7301441 — 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: Seongsu Bridge Context triple: [Han River, crossedBy, Seongsu Bridge]
-
A.
Dongho Bridge
Dongho Bridge is a major road bridge in Seoul, South Korea, carrying traffic across the Han River and connecting key districts of the city.
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B.
Gwangan Bridge
Gwangan Bridge is a prominent suspension bridge in Busan, South Korea, famed for its panoramic coastal views and colorful nighttime LED illuminations.
-
C.
Geumcheongyo Bridge
Geumcheongyo Bridge is a historic stone bridge within Seoul’s Changdeokgung Palace complex, notable as one of the oldest surviving palace bridges from the Joseon Dynasty.
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D.
Yeongdodaegyo Bridge
Yeongdodaegyo Bridge is a historic bascule bridge in Busan, South Korea, known for connecting the mainland to Yeongdo Island and for its iconic daily bridge-raising.
-
E.
Okcheongyo Bridge
Okcheongyo Bridge is a historic stone bridge within Seoul’s Changgyeonggung Palace complex, notable for its traditional Joseon-era architectural style and role in the palace’s ceremonial approach.
- 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: Seongsu Bridge Target entity description: Seongsu Bridge is a major road bridge in Seoul, South Korea, known both for its role in connecting districts across the Han River and for its infamous 1994 collapse and subsequent reconstruction.
-
A.
Dongho Bridge
Dongho Bridge is a major road bridge in Seoul, South Korea, carrying traffic across the Han River and connecting key districts of the city.
-
B.
Gwangan Bridge
Gwangan Bridge is a prominent suspension bridge in Busan, South Korea, famed for its panoramic coastal views and colorful nighttime LED illuminations.
-
C.
Geumcheongyo Bridge
Geumcheongyo Bridge is a historic stone bridge within Seoul’s Changdeokgung Palace complex, notable as one of the oldest surviving palace bridges from the Joseon Dynasty.
-
D.
Yeongdodaegyo Bridge
Yeongdodaegyo Bridge is a historic bascule bridge in Busan, South Korea, known for connecting the mainland to Yeongdo Island and for its iconic daily bridge-raising.
-
E.
Okcheongyo Bridge
Okcheongyo Bridge is a historic stone bridge within Seoul’s Changgyeonggung Palace complex, notable for its traditional Joseon-era architectural style and role in the palace’s ceremonial approach.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
bridge in South Korea
ⓘ
road bridge ⓘ steel truss bridge ⓘ |
| casualties |
17 injuries
ⓘ
32 deaths ⓘ |
| causeOfEvent | 1994 Seongsu Bridge collapse NERFINISHED ⓘ |
| collapseCause | structural failure due to poor welding and inadequate inspection ⓘ |
| collapseDate | 1994-10-21 ⓘ |
| connectsDistrict |
Gangnam District
NERFINISHED
ⓘ
Seongdong District NERFINISHED ⓘ |
| country | South Korea ⓘ |
| crosses | Han River NERFINISHED ⓘ |
| hasCoordinateLatitude | 37.541 ⓘ |
| hasCoordinateLongitude | 127.036 ⓘ |
| hasDesign | truss bridge ⓘ |
| hasHistoricalSignificance | triggered nationwide review of infrastructure safety in South Korea ⓘ |
| hasToll | no ⓘ |
| knownFor |
1994 structural collapse
ⓘ
subsequent reconstruction ⓘ |
| languageOfName | Korean ⓘ |
| length | approximately 1,160 meters ⓘ |
| locatedIn | Seoul NERFINISHED ⓘ |
| locatedInMetropolitanArea | Seoul Capital Area NERFINISHED ⓘ |
| locatedOnRiverSection | middle Han River in Seoul ⓘ |
| maintainedBy | Seoul Metropolitan Government NERFINISHED ⓘ |
| material |
concrete
ⓘ
steel ⓘ |
| mediaCoverage | extensive domestic and international news coverage in 1994 ⓘ |
| namedAfter | Seongsu-dong NERFINISHED ⓘ |
| nativeName | 성수대교 NERFINISHED ⓘ |
| numberOfLanes | 6 ⓘ |
| openingDate | 1979-10-15 ⓘ |
| owner | Seoul Metropolitan Government NERFINISHED ⓘ |
| partOf | Seoul road network ⓘ |
| partOfTransportSystem | Seoul arterial road network NERFINISHED ⓘ |
| reconstructionCompleted | 1997 ⓘ |
| reconstructionMethod | replacement of collapsed central span ⓘ |
| region |
Gangnam-gu
NERFINISHED
ⓘ
Seongdong-gu NERFINISHED ⓘ |
| reopeningDate | 1997-08-15 ⓘ |
| romanization | Seongsu-daegyo NERFINISHED ⓘ |
| safetyImprovementsAfterCollapse | strengthened inspection regime for bridges in South Korea ⓘ |
| trafficType | motor vehicles ⓘ |
| usedFor | daily commuter traffic across Han River ⓘ |
| width | approximately 19 meters ⓘ |
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: Seongsu Bridge Description of subject: Seongsu Bridge is a major road bridge in Seoul, South Korea, known both for its role in connecting districts across the Han River and for its infamous 1994 collapse and subsequent reconstruction.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.