Lake Vättern
E321719
Lake Vättern is Sweden’s second-largest lake, a deep, elongated freshwater body in south-central Sweden known for its clear waters and surrounding historic towns.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Lake Vättern canonical | 13 |
How this entity was disambiguated
This entity first appeared as the object of triple T3026489 — 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 Vättern Context triple: [Jönköping, locatedAtSouthernEndOf, Lake Vättern]
-
A.
Lake Mälaren
Lake Mälaren is a large freshwater lake in eastern Sweden that connects to the Baltic Sea and has Stockholm situated on its shores.
-
B.
Storsjön
Storsjön is a large lake in central Sweden, famed for its scenic surroundings and the local legend of the lake monster Storsjöodjuret.
-
C.
Tyresö-Flaten Lake
Tyresö-Flaten Lake is a natural lake in Tyresö Municipality, Sweden, known for its scenic surroundings and recreational opportunities such as swimming and outdoor activities.
-
D.
Lake Saimaa
Lake Saimaa is Finland’s largest lake, a vast labyrinthine freshwater system in the southeast known for its intricate shoreline, islands, and the endangered Saimaa ringed seal.
-
E.
Saltsjön
Saltsjön is a bay of the Baltic Sea forming part of the inner Stockholm archipelago and the main sea approach to central Stockholm.
- 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 Vättern Target entity description: Lake Vättern is Sweden’s second-largest lake, a deep, elongated freshwater body in south-central Sweden known for its clear waters and surrounding historic towns.
-
A.
Lake Mälaren
Lake Mälaren is a large freshwater lake in eastern Sweden that connects to the Baltic Sea and has Stockholm situated on its shores.
-
B.
Storsjön
Storsjön is a large lake in central Sweden, famed for its scenic surroundings and the local legend of the lake monster Storsjöodjuret.
-
C.
Tyresö-Flaten Lake
Tyresö-Flaten Lake is a natural lake in Tyresö Municipality, Sweden, known for its scenic surroundings and recreational opportunities such as swimming and outdoor activities.
-
D.
Lake Saimaa
Lake Saimaa is Finland’s largest lake, a vast labyrinthine freshwater system in the southeast known for its intricate shoreline, islands, and the endangered Saimaa ringed seal.
-
E.
Saltsjön
Saltsjön is a bay of the Baltic Sea forming part of the inner Stockholm archipelago and the main sea approach to central Stockholm.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
freshwater lake
ⓘ
lake ⓘ |
| adjacentCity |
Askersund
ⓘ
Hjo ⓘ Jönköping ⓘ Motala ⓘ Vadstena ⓘ |
| averageDepth | approximately 40 metres ⓘ |
| basinPopulation | several hundred thousand people ⓘ |
| catchmentArea | approximately 4,500 square kilometres ⓘ |
| connectedTo | Baltic Sea via Motala Ström ⓘ |
| continent | Europe ⓘ |
| country | Sweden ⓘ |
| drainageBasinCountry | Sweden ⓘ |
| elevationAboveSeaLevel | approximately 88 metres ⓘ |
| formedDuring | last Ice Age ⓘ |
| geologicalOrigin | glacial lake ⓘ |
| hasIsland |
Hammarsundet islands
ⓘ
Jungfrun ⓘ Visingsö ⓘ |
| hasPort |
Jönköping harbour
ⓘ
Motala harbour ⓘ |
| knownFor |
clear water
ⓘ
great water transparency ⓘ surrounding historic towns ⓘ |
| length | approximately 135 kilometres ⓘ |
| locatedIn |
Central Sweden
ⓘ
surface form:
south-central Sweden
|
| locatedInAdministrativeTerritory |
Jönköping County
ⓘ
Östergötland County ⓘ
surface form:
Västra Götaland County
Örebro County ⓘ Östergötland County ⓘ |
| maximumDepth | approximately 128 metres ⓘ |
| nearbyHistoricSite |
Alvastra Abbey
ⓘ
Vadstena Castle ⓘ Visingsborg Castle ruins ⓘ |
| outflow | Motala Ström ⓘ |
| partOf | Swedish lake system ⓘ |
| rankingByAreaInSweden | second-largest lake in Sweden ⓘ |
| recreation |
angling
ⓘ
boating ⓘ diving ⓘ ice fishing ⓘ |
| salinity | very low ⓘ |
| shape | elongated ⓘ |
| surfaceArea | approximately 1,893 square kilometres ⓘ |
| waterClarity | high ⓘ |
| waterType | freshwater ⓘ |
| waterUse |
drinking water source
ⓘ
fishing ⓘ recreational activities ⓘ |
| width | up to about 31 kilometres ⓘ |
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 Vättern Description of subject: Lake Vättern is Sweden’s second-largest lake, a deep, elongated freshwater body in south-central Sweden known for its clear waters and surrounding historic towns.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Göta Canal