Saemangeum Seawall
E684559
Saemangeum Seawall is a massive coastal dyke in South Korea that created one of the world’s largest reclaimed land and tidal flat areas by enclosing part of the Yellow Sea.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Saemangeum Industrial Complex | 1 |
| Saemangeum Seawall canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7719344 — 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: Saemangeum Seawall Context triple: [Gunsan, near, Saemangeum Seawall]
-
A.
Chonhar Peninsula causeways
The Chonhar Peninsula causeways are strategic transport links connecting mainland Ukraine with the Crimean Peninsula across the Syvash lagoon, significant for both civilian transit and military logistics.
-
B.
Banpo Bridge
Banpo Bridge is a major double-deck bridge over the Han River in Seoul, South Korea, famous for its Moonlight Rainbow Fountain show.
-
C.
Yeongdo Channel
Yeongdo Channel is a narrow body of water in Busan, South Korea, separating Yeongdo Island from the mainland and serving as an important maritime passage.
-
D.
Incheon Bridge
Incheon Bridge is a major cable-stayed bridge in South Korea that links Incheon International Airport on Yeongjong Island with the mainland city of Incheon, serving as a key transportation and logistics route.
-
E.
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.
- 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: Saemangeum Seawall Target entity description: Saemangeum Seawall is a massive coastal dyke in South Korea that created one of the world’s largest reclaimed land and tidal flat areas by enclosing part of the Yellow Sea.
-
A.
Chonhar Peninsula causeways
The Chonhar Peninsula causeways are strategic transport links connecting mainland Ukraine with the Crimean Peninsula across the Syvash lagoon, significant for both civilian transit and military logistics.
-
B.
Banpo Bridge
Banpo Bridge is a major double-deck bridge over the Han River in Seoul, South Korea, famous for its Moonlight Rainbow Fountain show.
-
C.
Yeongdo Channel
Yeongdo Channel is a narrow body of water in Busan, South Korea, separating Yeongdo Island from the mainland and serving as an important maritime passage.
-
D.
Incheon Bridge
Incheon Bridge is a major cable-stayed bridge in South Korea that links Incheon International Airport on Yeongjong Island with the mainland city of Incheon, serving as a key transportation and logistics route.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
coastal dyke
ⓘ
land reclamation project ⓘ seawall ⓘ |
| bodyOfWater | Yellow Sea NERFINISHED ⓘ |
| constructionEndDate | 2006 ⓘ |
| constructionMaterial |
concrete
ⓘ
earth ⓘ rock ⓘ |
| constructionStartDate | 1991 ⓘ |
| continent | Asia ⓘ |
| coordinateSystem | WGS84 ⓘ |
| country | South Korea ⓘ |
| creates |
Saemangeum reclaimed land area
NERFINISHED
ⓘ
Saemangeum tidal flat enclosure ⓘ |
| encloses |
Saemangeum tidal flats
NERFINISHED
ⓘ
part of the Yellow Sea ⓘ |
| environmentalImpact |
habitat change for migratory birds
ⓘ
loss of tidal flats ⓘ |
| hasPart |
roadway
ⓘ
sluice gates ⓘ |
| inception | 1991 ⓘ |
| length | approximately 33 kilometers ⓘ |
| locatedIn |
Saemangeum
NERFINISHED
ⓘ
Yellow Sea NERFINISHED ⓘ |
| locatedInAdministrativeTerritory |
Buan County
NERFINISHED
ⓘ
Gunsan NERFINISHED ⓘ North Jeolla Province NERFINISHED ⓘ |
| locatedInCountry | Republic of Korea NERFINISHED ⓘ |
| maintainedBy | Korea Rural Community Corporation NERFINISHED ⓘ |
| nearbyCity |
Buan
NERFINISHED
ⓘ
Gunsan NERFINISHED ⓘ |
| notableFor |
being one of the longest seawalls in the world
ⓘ
creating one of the world’s largest reclaimed land areas ⓘ large-scale tidal flat reclamation ⓘ |
| officialOpeningDate | 2010 ⓘ |
| openedToPublic | 2010 ⓘ |
| operator | Korea Rural Community Corporation NERFINISHED ⓘ |
| partOf | Saemangeum Project NERFINISHED ⓘ |
| purpose |
agricultural development
ⓘ
flood control ⓘ industrial development ⓘ land reclamation ⓘ |
| separates |
Saemangeum inland waters
NERFINISHED
ⓘ
Yellow Sea NERFINISHED ⓘ |
| subjectOf |
environmental controversy
ⓘ
legal challenges by environmental groups ⓘ |
| traversedBy | road ⓘ |
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: Saemangeum Seawall Description of subject: Saemangeum Seawall is a massive coastal dyke in South Korea that created one of the world’s largest reclaimed land and tidal flat areas by enclosing part of the Yellow Sea.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Gunsan
this entity surface form:
Saemangeum Industrial Complex
subject surface form:
Gunsan