Lake Peipus
E88220
Lake Peipus is a large transboundary freshwater lake on the border between Estonia and Russia, known for its ecological importance and historical significance as the site of the 1242 Battle on the Ice.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Lake Peipus canonical | 16 |
| Estonian–Russian transboundary water system | 1 |
| Lake Peipsi | 1 |
| Lake Peipus basin | 1 |
| Peipsi Lake | 1 |
| Peipsi–Pihkva Lake | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T600916 — 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 Peipus Context triple: [Northwestern Federal District, hasMajorLake, Lake Peipus]
-
A.
Lake Ladoga
Lake Ladoga is a vast freshwater lake in northwestern Russia, renowned as the largest lake in Europe and an important ecological and historical region.
-
B.
Lake Onega
Lake Onega is one of Europe's largest freshwater lakes, located in northwestern Russia and known for its numerous islands, historic monasteries, and significant ecological and economic importance.
-
C.
Ladoga Karelia
Ladoga Karelia is a historical region in southeastern Finland, bordering Lake Ladoga, that was ceded to the Soviet Union after the Winter War.
-
D.
White Sea
The White Sea is a southern inlet of the Barents Sea in the northwest of Russia, known as an important Arctic marginal sea with major ports like Arkhangelsk and connections to Russia’s inland waterways.
-
E.
Baltic Ice Lake
The Baltic Ice Lake was a large proglacial lake that existed at the end of the last Ice Age in the area now occupied by the northern Baltic Sea.
- 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 Peipus Target entity description: Lake Peipus is a large transboundary freshwater lake on the border between Estonia and Russia, known for its ecological importance and historical significance as the site of the 1242 Battle on the Ice.
-
A.
Lake Ladoga
Lake Ladoga is a vast freshwater lake in northwestern Russia, renowned as the largest lake in Europe and an important ecological and historical region.
-
B.
Lake Onega
Lake Onega is one of Europe's largest freshwater lakes, located in northwestern Russia and known for its numerous islands, historic monasteries, and significant ecological and economic importance.
-
C.
Ladoga Karelia
Ladoga Karelia is a historical region in southeastern Finland, bordering Lake Ladoga, that was ceded to the Soviet Union after the Winter War.
-
D.
White Sea
The White Sea is a southern inlet of the Barents Sea in the northwest of Russia, known as an important Arctic marginal sea with major ports like Arkhangelsk and connections to Russia’s inland waterways.
-
E.
Baltic Ice Lake
The Baltic Ice Lake was a large proglacial lake that existed at the end of the last Ice Age in the area now occupied by the northern Baltic Sea.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
battle
ⓘ
freshwater lake ⓘ lake ⓘ transboundary lake ⓘ |
| basinCountry |
Estonia
ⓘ
Russia ⓘ |
| border | Estonia–Russia border ⓘ |
| borderCity |
Pskov
ⓘ
Tartu ⓘ |
| borderSettlement |
Gdov
ⓘ
Kallaste ⓘ Mustvee ⓘ |
| continent | Europe ⓘ |
| country |
Estonia
ⓘ
Russia ⓘ |
| drainageBasinCountry |
Estonia
ⓘ
Russia ⓘ |
| ecosystemType | lake ecosystem ⓘ |
| eventLocation | Battle on the Ice ⓘ |
| hasAlternativeName |
Lake Peipus
ⓘ
surface form:
Peipsi Lake
Lake Peipus ⓘ
surface form:
Peipsi–Pihkva Lake
|
| hasEnvironmentalIssue |
biodiversity pressure
ⓘ
eutrophication risk ⓘ pollution from agriculture ⓘ |
| hasLanguageRegion |
Estonian
ⓘ
Russian language ⓘ
surface form:
Russian
|
| hasLegalStatus | international lake ⓘ |
| hasPart |
Lake Lämmi
ⓘ
Lake Peipus self-linksurface differs ⓘ
surface form:
Lake Peipsi
Lake Pihkva ⓘ |
| hasUse |
commercial fishing
ⓘ
recreational fishing ⓘ tourism ⓘ transportation ⓘ |
| knownFor |
Battle on the Ice
ⓘ
bird habitats ⓘ ecological importance ⓘ fishing ⓘ |
| locatedIn |
Baltic states
ⓘ
surface form:
Baltic region
Eastern Europe ⓘ |
| locatedOnBorderOf |
Estonia
ⓘ
Russia ⓘ |
| location | Lake Peipus self-linksurface differs ⓘ |
| outflow | Narva River ⓘ |
| partOf |
Lake Peipus
self-linksurface differs
ⓘ
surface form:
Estonian–Russian transboundary water system
Narva River ⓘ
surface form:
Narva River basin
|
| pointInTime | 1242 ⓘ |
| significantEvent | Battle on the Ice ⓘ |
| 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: Lake Peipus Description of subject: Lake Peipus is a large transboundary freshwater lake on the border between Estonia and Russia, known for its ecological importance and historical significance as the site of the 1242 Battle on the Ice.
Referenced by (21)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Battle on the Ice
this entity surface form:
Lake Peipsi
this entity surface form:
Estonian–Russian transboundary water system
this entity surface form:
Peipsi Lake
this entity surface form:
Peipsi–Pihkva Lake
this entity surface form:
Lake Peipus basin