Lake Ketelmeer
E649902
Lake Ketelmeer is a shallow border lake in the central Netherlands, forming part of the IJsselmeer lake system and serving as a key waterway and ecological area at the mouth of the River IJssel.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lake Ketelmeer canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7190837 — 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: Lake Ketelmeer Context triple: [IJssel, connectedTo, Lake Ketelmeer]
-
A.
Haarlemmermeer
Haarlemmermeer is a municipality in the province of North Holland in the Netherlands, best known for encompassing Amsterdam Airport Schiphol.
-
B.
Volkerakmeer
Volkerakmeer is a lake in the southwestern Netherlands that forms part of the Rhine–Meuse–Scheldt delta and serves as an important waterway and water management area.
-
C.
Meppelerdiep
Meppelerdiep is a canalized river and important waterway in the northeastern Netherlands that connects the town of Meppel with larger regional waterways.
-
D.
Grevelingenmeer
Grevelingenmeer is a large saltwater lake in the southwestern Netherlands, known for its water sports, nature reserves, and role in the Delta Works coastal defense system.
-
E.
Alkmaardermeer
Alkmaardermeer is a lake in North Holland, the Netherlands, known for recreational boating, sailing, and waterside leisure activities.
- 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: Lake Ketelmeer Target entity description: Lake Ketelmeer is a shallow border lake in the central Netherlands, forming part of the IJsselmeer lake system and serving as a key waterway and ecological area at the mouth of the River IJssel.
-
A.
Haarlemmermeer
Haarlemmermeer is a municipality in the province of North Holland in the Netherlands, best known for encompassing Amsterdam Airport Schiphol.
-
B.
Volkerakmeer
Volkerakmeer is a lake in the southwestern Netherlands that forms part of the Rhine–Meuse–Scheldt delta and serves as an important waterway and water management area.
-
C.
Meppelerdiep
Meppelerdiep is a canalized river and important waterway in the northeastern Netherlands that connects the town of Meppel with larger regional waterways.
-
D.
Grevelingenmeer
Grevelingenmeer is a large saltwater lake in the southwestern Netherlands, known for its water sports, nature reserves, and role in the Delta Works coastal defense system.
-
E.
Alkmaardermeer
Alkmaardermeer is a lake in North Holland, the Netherlands, known for recreational boating, sailing, and waterside leisure activities.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
border lake
ⓘ
lake ⓘ |
| basinCountry | Netherlands NERFINISHED ⓘ |
| connectedBy | Ketelbrug NERFINISHED ⓘ |
| connectedTo |
IJsselmeer
NERFINISHED
ⓘ
Veluwemeer NERFINISHED ⓘ Zwarte Meer NERFINISHED ⓘ |
| country | Netherlands ⓘ |
| crossedBy | Ketelbrug NERFINISHED ⓘ |
| ecologicalRole | important ecological area ⓘ |
| hasAverageDepth | shallow ⓘ |
| hasBridge | Ketelbrug NERFINISHED ⓘ |
| hasEcosystem |
aquatic birds habitat
ⓘ
fish habitat ⓘ wetland ecosystem ⓘ |
| hasEnvironmentalIssue | sediment contamination ⓘ |
| hasNavigationRoute | IJssel–IJsselmeer route NERFINISHED ⓘ |
| hasShorelineUse |
agricultural land
ⓘ
nature reserves ⓘ recreational areas ⓘ |
| hasStructure | IJsseloog artificial island NERFINISHED ⓘ |
| IJsseloog artificial islandFunction | storage of contaminated dredged material ⓘ |
| inflow | River IJssel NERFINISHED ⓘ |
| locatedAtMouthOf | River IJssel NERFINISHED ⓘ |
| locatedIn | central Netherlands NERFINISHED ⓘ |
| locatedInProvince |
Flevoland
NERFINISHED
ⓘ
Overijssel NERFINISHED ⓘ |
| locatedInRegion |
Flevopolder vicinity
ⓘ
IJssel delta NERFINISHED ⓘ |
| locatedNear |
Dronten
NERFINISHED
ⓘ
Kampen NERFINISHED ⓘ |
| outflow |
Lake IJsselmeer
NERFINISHED
ⓘ
Lake Veluwemeer NERFINISHED ⓘ Lake Zwarte Meer NERFINISHED ⓘ |
| partOf |
Dutch delta water system
ⓘ
IJssel river mouth area ⓘ IJsselmeer lake system NERFINISHED ⓘ Randmeren NERFINISHED ⓘ |
| separatedFrom |
IJsselmeer
NERFINISHED
ⓘ
IJsselmeer by dikes ⓘ |
| usedFor |
inland shipping
ⓘ
recreation ⓘ water management ⓘ |
| waterBodyType | shallow lake ⓘ |
| waterManagementAuthority | Rijkswaterstaat NERFINISHED ⓘ |
| waterSalinity | freshwater ⓘ |
| waterwayFunction | key waterway ⓘ |
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: Lake Ketelmeer Description of subject: Lake Ketelmeer is a shallow border lake in the central Netherlands, forming part of the IJsselmeer lake system and serving as a key waterway and ecological area at the mouth of the River IJssel.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
IJssel