Maeslantkering
E15706
Maeslantkering is a massive movable storm surge barrier in the Netherlands that protects the low-lying Rotterdam region from North Sea flooding.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Maeslantkering canonical | 11 |
| Maeslantkering control center | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T118683 — 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: Maeslantkering Context triple: [Rhine–Meuse–Scheldt delta, hasFloodProtectionStructure, Maeslantkering]
-
A.
Hollein
Hollein is a German-language surname most prominently associated with Austrian architects Hans Hollein and his son Max Hollein, a leading museum director.
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B.
Lord of Mann
Lord of Mann is the feudal title held by the British monarch as the head of state of the Isle of Man, reflecting the island’s unique constitutional status.
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C.
Achterhooks
Achterhooks is a regional Low Saxon dialect spoken in the Achterhoek area of the eastern Netherlands.
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D.
Litany
The Litany is a traditional Christian form of responsive prayer, especially prominent in Anglican worship, consisting of a series of petitions and supplications recited by a leader and answered by the congregation.
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E.
Heer
The Heer was the land-based component of Nazi Germany’s armed forces, serving as its primary army during World War II.
- 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: Maeslantkering Target entity description: Maeslantkering is a massive movable storm surge barrier in the Netherlands that protects the low-lying Rotterdam region from North Sea flooding.
-
A.
Hollein
Hollein is a German-language surname most prominently associated with Austrian architects Hans Hollein and his son Max Hollein, a leading museum director.
-
B.
Lord of Mann
Lord of Mann is the feudal title held by the British monarch as the head of state of the Isle of Man, reflecting the island’s unique constitutional status.
-
C.
Achterhooks
Achterhooks is a regional Low Saxon dialect spoken in the Achterhoek area of the eastern Netherlands.
-
D.
Litany
The Litany is a traditional Christian form of responsive prayer, especially prominent in Anglican worship, consisting of a series of petitions and supplications recited by a leader and answered by the congregation.
-
E.
Heer
The Heer was the land-based component of Nazi Germany’s armed forces, serving as its primary army during World War II.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
civil engineering structure
ⓘ
movable flood barrier ⓘ storm surge barrier ⓘ |
| clearanceBelow | about 17 m when open ⓘ |
| closureFrequency | a few times per decade ⓘ |
| closureThreshold | 3.0 m above NAP at Rotterdam ⓘ |
| constructionStartDate | 1991 ⓘ |
| controlSystem |
BOS computer system
ⓘ
fully automated ⓘ |
| coordinates | 51.955°N 4.122°E ⓘ |
| country | Netherlands ⓘ |
| designedBy |
HBG Civiel
ⓘ
Hollandse Beton Groep ⓘ Rijkswaterstaat ⓘ |
| designedForWaterLevel | 3.0 m above NAP ⓘ |
| designedReturnPeriod | 1 in 10,000 years storm surge ⓘ |
| gateWeight | 6800 tonnes per gate ⓘ |
| hasPart |
two ball-and-socket joints
ⓘ
two floating sector gates ⓘ two retaining walls ⓘ |
| hasVisitorCenter | Keringhuis ⓘ |
| height | about 22 m above waterline ⓘ |
| inaugurationDate | 1997 ⓘ |
| length | 240 m per gate ⓘ |
| locatedAtMouthOf | Nieuwe Maas ⓘ |
| locatedIn |
Rotterdam–The Hague metropolitan area
ⓘ
South Holland ⓘ |
| locatedNear |
Hoek van Holland
ⓘ
Maassluis ⓘ |
| locatedOn | Nieuwe Waterweg ⓘ |
| material |
concrete
ⓘ
steel ⓘ |
| namedAfter | Maeslant (Maas estuary) ⓘ |
| notableFor |
largest ball-and-socket joints in the world
ⓘ
one of the largest moving structures on Earth ⓘ |
| opened | 1997-05-10 ⓘ |
| operator | Rijkswaterstaat ⓘ |
| partOf | Delta Works ⓘ |
| projectName |
Europoortkering
ⓘ
linked to:
Europoort
|
| protects |
Port of Rotterdam
ⓘ
Rhine–Meuse–Scheldt delta ⓘ Rotterdam ⓘ |
| purpose |
flood protection for Rotterdam region
ⓘ
protection against North Sea storm surges ⓘ |
| span | 360 m opening ⓘ |
| testClosureFrequency | once per year ⓘ |
| touristAttraction | yes ⓘ |
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: Maeslantkering Description of subject: Maeslantkering is a massive movable storm surge barrier in the Netherlands that protects the low-lying Rotterdam region from North Sea flooding.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Maeslantkering