IJsselmeer water system
E574640
The IJsselmeer water system is a major Dutch freshwater lake and surrounding hydraulic network created by damming part of the Zuiderzee, playing a key role in flood protection, water management, and regional ecology.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IJsselmeer water system canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6153923 — 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: IJsselmeer water system Context triple: [Houtribdijk, partOf, IJsselmeer water system]
-
A.
Dutch inland waterway network
The Dutch inland waterway network is an extensive, interconnected system of rivers, canals, and lakes that supports domestic and international freight transport, recreation, and water management throughout the Netherlands.
-
B.
Ringvaart of the Haarlemmermeer
The Ringvaart of the Haarlemmermeer is a large encircling canal in the Netherlands that was constructed to drain the former Haarlemmermeer lake and now serves as a major waterway.
-
C.
Hollandse IJssel basin
The Hollandse IJssel basin is a river drainage area in the western Netherlands associated with the Hollandse IJssel, a distributary of the Rhine that plays an important role in regional water management and flood control.
-
D.
Utrecht canal system
The Utrecht canal system is a historic network of waterways in the Dutch city of Utrecht, renowned for its unique sunken wharf cellars, picturesque quays, and central role in the city’s medieval and modern urban life.
-
E.
Flevopolder
Flevopolder is a large artificial island and polder in the Netherlands, created by land reclamation and known as one of the world’s largest man-made islands.
- 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: IJsselmeer water system Target entity description: The IJsselmeer water system is a major Dutch freshwater lake and surrounding hydraulic network created by damming part of the Zuiderzee, playing a key role in flood protection, water management, and regional ecology.
-
A.
Dutch inland waterway network
The Dutch inland waterway network is an extensive, interconnected system of rivers, canals, and lakes that supports domestic and international freight transport, recreation, and water management throughout the Netherlands.
-
B.
Ringvaart of the Haarlemmermeer
The Ringvaart of the Haarlemmermeer is a large encircling canal in the Netherlands that was constructed to drain the former Haarlemmermeer lake and now serves as a major waterway.
-
C.
Hollandse IJssel basin
The Hollandse IJssel basin is a river drainage area in the western Netherlands associated with the Hollandse IJssel, a distributary of the Rhine that plays an important role in regional water management and flood control.
-
D.
Utrecht canal system
The Utrecht canal system is a historic network of waterways in the Dutch city of Utrecht, renowned for its unique sunken wharf cellars, picturesque quays, and central role in the city’s medieval and modern urban life.
-
E.
Flevopolder
Flevopolder is a large artificial island and polder in the Netherlands, created by land reclamation and known as one of the world’s largest man-made islands.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
freshwater lake system
ⓘ
water management system ⓘ |
| basinCountry | Netherlands NERFINISHED ⓘ |
| connectsTo |
North Sea Canal system
NERFINISHED
ⓘ
River Rhine basin ⓘ Wadden Sea NERFINISHED ⓘ |
| country | Netherlands ⓘ |
| formedBy |
closure of the Zuiderzee
ⓘ
construction of the Afsluitdijk ⓘ |
| hasPart |
Afsluitdijk
NERFINISHED
ⓘ
Eem River NERFINISHED ⓘ Houtribdijk NERFINISHED ⓘ IJssel River NERFINISHED ⓘ IJsselmeer NERFINISHED ⓘ Ketelmeer NERFINISHED ⓘ Lake Eemmeer NERFINISHED ⓘ Lake Gooimeer NERFINISHED ⓘ Lake IJmeer NERFINISHED ⓘ Lake Veluwe NERFINISHED ⓘ Markermeer NERFINISHED ⓘ Randmeren NERFINISHED ⓘ Vecht River (Overijssel) NERFINISHED ⓘ dikes ⓘ polders ⓘ pumping stations ⓘ sluices ⓘ |
| inception | 1932 ⓘ |
| locatedIn |
Flevoland
NERFINISHED
ⓘ
Friesland NERFINISHED ⓘ Noord-Holland NERFINISHED ⓘ Overijssel NERFINISHED ⓘ |
| mainInflow |
Eem River
NERFINISHED
ⓘ
IJssel River NERFINISHED ⓘ Vecht River (Overijssel) NERFINISHED ⓘ |
| mainOutflow |
North Sea Canal via Oranjesluizen
NERFINISHED
ⓘ
Wadden Sea via Afsluitdijk sluices ⓘ |
| manages | water levels for surrounding polders ⓘ |
| operator | Rijkswaterstaat NERFINISHED ⓘ |
| partOf |
Dutch Delta Programme
NERFINISHED
ⓘ
Dutch national water system NERFINISHED ⓘ |
| previouslyPartOf | Zuiderzee NERFINISHED ⓘ |
| regulates | freshwater availability for the Netherlands ⓘ |
| significantFor |
bird habitats
ⓘ
climate adaptation in the Netherlands ⓘ fish migration ⓘ |
| usedFor |
ecological management
ⓘ
flood protection ⓘ freshwater supply ⓘ navigation ⓘ recreation ⓘ |
| waterType | freshwater ⓘ |
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: IJsselmeer water system Description of subject: The IJsselmeer water system is a major Dutch freshwater lake and surrounding hydraulic network created by damming part of the Zuiderzee, playing a key role in flood protection, water management, and regional ecology.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.