Ältasjön
E507331
Ältasjön is a lake in the Stockholm area of Sweden, known for its recreational opportunities and natural surroundings within the Nacka nature reserve.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T5200846 — 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: Ältasjön Context triple: [Nackareservatet, hasBodyOfWater, Ältasjön]
-
A.
Munksjön
Munksjön is a small urban lake situated in central Jönköping in southern Sweden, known for its promenades, recreational areas, and proximity to the city’s downtown.
-
B.
Saltsjön
Saltsjön is a bay of the Baltic Sea forming part of the inner Stockholm archipelago and the main sea approach to central Stockholm.
-
C.
Storsjön
Storsjön is a large lake in central Sweden, famed for its scenic surroundings and the local legend of the lake monster Storsjöodjuret.
-
D.
Bornsjön
Bornsjön is a lake in Stockholm County, Sweden, known as a protected freshwater reservoir and nature area near Salem.
-
E.
Bällstaån
Bällstaån is a small river in the Stockholm area of Sweden that flows through several suburbs before emptying into Bällstaviken.
- 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: Ältasjön Target entity description: Ältasjön is a lake in the Stockholm area of Sweden, known for its recreational opportunities and natural surroundings within the Nacka nature reserve.
-
A.
Munksjön
Munksjön is a small urban lake situated in central Jönköping in southern Sweden, known for its promenades, recreational areas, and proximity to the city’s downtown.
-
B.
Saltsjön
Saltsjön is a bay of the Baltic Sea forming part of the inner Stockholm archipelago and the main sea approach to central Stockholm.
-
C.
Storsjön
Storsjön is a large lake in central Sweden, famed for its scenic surroundings and the local legend of the lake monster Storsjöodjuret.
-
D.
Bornsjön
Bornsjön is a lake in Stockholm County, Sweden, known as a protected freshwater reservoir and nature area near Salem.
-
E.
Bällstaån
Bällstaån is a small river in the Stockholm area of Sweden that flows through several suburbs before emptying into Bällstaviken.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf | lake ⓘ |
| country | Sweden ⓘ |
| drainageBasin | Sicklaån basin ⓘ |
| hasActivity |
bird watching
ⓘ
jogging ⓘ nature study ⓘ picnicking ⓘ |
| hasConservationStatus | protected within Nacka nature reserve ⓘ |
| hasEnvironmentalConcern |
eutrophication risk
ⓘ
stormwater inflow from surrounding residential areas ⓘ |
| hasFeature |
barbecue areas nearby
ⓘ
bathing area ⓘ birdlife ⓘ forested shoreline ⓘ piers ⓘ playground nearby ⓘ reeds ⓘ walking trails ⓘ |
| hasNearbyFacility |
parking areas
ⓘ
public transport stops ⓘ recreational paths connecting to Nacka reserve ⓘ |
| hasRegulation |
boating restrictions
ⓘ
fishing rules ⓘ |
| hasUse |
angling
ⓘ
bathing ⓘ boating ⓘ ice skating ⓘ recreation ⓘ |
| inflow | local streams ⓘ |
| locatedIn |
Nacka Municipality
ⓘ
Nacka reserve and green wedge system of Stockholm ⓘ
linked to:
Stockholm region green structure
Stockholm County ⓘ Stockholm Municipality ⓘ |
| locatedInRegion |
Stockholm urban area
ⓘ
linked to:
Metropolitan Stockholm
|
| locatedNear |
Hellasgården
ⓘ
Skarpnäck ⓘ Söderbysjön ⓘ Älta ⓘ |
| managedBy |
Nacka Municipality
ⓘ
Stockholm Municipality ⓘ |
| outflow |
Sicklaån
ⓘ
linked to:
Sickla
|
| partOf |
Nacka nature reserve
ⓘ
linked to:
Nackareservatet
Stockholm green infrastructure network ⓘ
linked to:
Stockholm region green structure
|
| 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: Ältasjön Description of subject: Ältasjön is a lake in the Stockholm area of Sweden, known for its recreational opportunities and natural surroundings within the Nacka nature reserve.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ältasjön