IJmeer
E33325
IJmeer is a shallow lake in the Netherlands, located east of Amsterdam and forming part of the IJsselmeer lake system.
All labels observed (3)
| Label | Occurrences |
|---|---|
| IJmeer canonical | 35 |
| IJburg bay | 1 |
| Markermeer–IJmeer region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T184237 — 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: IJmeer Context triple: [IJ Bay, connectedTo, IJmeer]
-
A.
Nieuwe Waterweg
Nieuwe Waterweg is a major artificial ship canal in the Netherlands that provides a direct deep-water connection between the North Sea and the port of Rotterdam.
-
B.
IJssel
The IJssel is a major distributary branch of the Rhine River in the Netherlands, flowing northward to the IJsselmeer and playing an important role in the country’s water management and inland navigation.
-
C.
Haarlemmermeer
Haarlemmermeer is a municipality in the province of North Holland in the Netherlands, best known for encompassing Amsterdam Airport Schiphol.
-
D.
Brouwersdam
Brouwersdam is a major Dutch dam and causeway in the Rhine–Meuse–Scheldt delta, built as part of the Delta Works to protect the Netherlands from North Sea flooding while supporting road traffic and water management.
-
E.
Hollandsche IJssel
Hollandsche IJssel is a river in the western Netherlands that flows through the provinces of South Holland and Utrecht and plays a role in regional water management and flood control.
- 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: IJmeer Target entity description: IJmeer is a shallow lake in the Netherlands, located east of Amsterdam and forming part of the IJsselmeer lake system.
-
A.
Nieuwe Waterweg
Nieuwe Waterweg is a major artificial ship canal in the Netherlands that provides a direct deep-water connection between the North Sea and the port of Rotterdam.
-
B.
IJssel
The IJssel is a major distributary branch of the Rhine River in the Netherlands, flowing northward to the IJsselmeer and playing an important role in the country’s water management and inland navigation.
-
C.
Haarlemmermeer
Haarlemmermeer is a municipality in the province of North Holland in the Netherlands, best known for encompassing Amsterdam Airport Schiphol.
-
D.
Brouwersdam
Brouwersdam is a major Dutch dam and causeway in the Rhine–Meuse–Scheldt delta, built as part of the Delta Works to protect the Netherlands from North Sea flooding while supporting road traffic and water management.
-
E.
Hollandsche IJssel
Hollandsche IJssel is a river in the western Netherlands that flows through the provinces of South Holland and Utrecht and plays a role in regional water management and flood control.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
lake
ⓘ
shallow lake ⓘ |
| adjacentTo |
Almere
ⓘ
Diemen ⓘ IJburg ⓘ Muiden ⓘ |
| averageDepth | shallow ⓘ |
| basinCountry | Netherlands ⓘ |
| connectedTo |
Amsterdam-Rhine Canal
ⓘ
linked to:
Amsterdam–Rhine Canal
IJburg bay ⓘ
linked to:
IJmeer
IJsselmeer ⓘ Markermeer ⓘ |
| country | Netherlands ⓘ |
| formedAfter | closure of Zuiderzee by Afsluitdijk ⓘ |
| hasEcologicalSignificance |
bird habitat
ⓘ
fish habitat ⓘ |
| hasIsland |
Pampus
ⓘ
linked to:
Cruquius
|
| hasNameOrigin | derived from IJ ⓘ |
| hasProposedProject |
IJmeer bridge
ⓘ
land reclamation near Almere ⓘ |
| hasShoreline |
Almere
ⓘ
Amsterdam ⓘ Diemen ⓘ Muiden ⓘ |
| hasTransportationRole | shipping route to Amsterdam ⓘ |
| hasUseConstraint | environmental regulations ⓘ |
| historicallyPartOf |
Zuiderzee
ⓘ
linked to:
IJsselmeer
|
| isSubjectOf |
ecological restoration plans
ⓘ
spatial planning debates ⓘ |
| locatedEastOf | Amsterdam ⓘ |
| locatedIn |
province of Flevoland
ⓘ
province of North Holland ⓘ
linked to:
North Holland
western Netherlands ⓘ
linked to:
Western Netherlands
|
| near |
Fort Pampus
ⓘ
Pampus island ⓘ |
| partOf |
IJsselmeer
ⓘ
Natura 2000 network ⓘ Randstad region ⓘ
linked to:
Randstad metropolitan region
former Zuiderzee area ⓘ |
| protectedStatus | European protected area ⓘ |
| separatedBy | Houtribdijk ⓘ |
| separatedFrom | Markermeer ⓘ |
| usedFor |
nature conservation
ⓘ
recreation ⓘ water sports ⓘ |
| waterBodyType | inland lake ⓘ |
| waterSalinity | freshwater ⓘ |
| waterSystem |
IJsselmeer lake system
ⓘ
linked to:
IJsselmeer
|
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: IJmeer Description of subject: IJmeer is a shallow lake in the Netherlands, located east of Amsterdam and forming part of the IJsselmeer lake system.
Referenced by (37)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: IJmeer
subject linked to:
Pampus island
subject linked to:
IJ river
linked to: IJmeer
subject linked to:
municipality of Gooise Meren