Tosna River
E61943
The Tosna River is a waterway in northwestern Russia that flows through the Leningrad Oblast before joining the Neva River.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Tosna River canonical | 7 |
| Tosna River basin | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T485635 — 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: Tosna River Context triple: [Neva River, hasTributary, Tosna River]
-
A.
Izhora River
The Izhora River is a small river in northwestern Russia that flows through the Leningrad Oblast and Saint Petersburg region before joining the Neva River.
-
B.
Fontanka River
The Fontanka River is a major distributary of the Neva in Saint Petersburg, Russia, known for its historic embankments, bridges, and role in defining the city’s central layout.
-
C.
Vetluga River
The Vetluga River is a significant waterway in western Russia that flows through several regions before joining the Volga River.
-
D.
Okhta River
The Okhta River is a tributary waterway in northwestern Russia that flows through Saint Petersburg before joining the Neva River.
-
E.
Moika River
The Moika River is a small, historic waterway in central Saint Petersburg, Russia, lined with notable palaces and landmarks and forming part of the city’s iconic canal network.
- 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: Tosna River Target entity description: The Tosna River is a waterway in northwestern Russia that flows through the Leningrad Oblast before joining the Neva River.
-
A.
Izhora River
The Izhora River is a small river in northwestern Russia that flows through the Leningrad Oblast and Saint Petersburg region before joining the Neva River.
-
B.
Fontanka River
The Fontanka River is a major distributary of the Neva in Saint Petersburg, Russia, known for its historic embankments, bridges, and role in defining the city’s central layout.
-
C.
Vetluga River
The Vetluga River is a significant waterway in western Russia that flows through several regions before joining the Volga River.
-
D.
Okhta River
The Okhta River is a tributary waterway in northwestern Russia that flows through Saint Petersburg before joining the Neva River.
-
E.
Moika River
The Moika River is a small, historic waterway in central Saint Petersburg, Russia, lined with notable palaces and landmarks and forming part of the city’s iconic canal network.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | Russia ⓘ |
| country | Russia ⓘ |
| dischargesInto | Neva River ⓘ |
| flowsNear | town of Tosno ⓘ |
| flowsThrough |
Kirovsky District, Leningrad Oblast
ⓘ
Tosnensky District ⓘ |
| hasFeature |
canyons and ravines in lower course
ⓘ
limestone banks ⓘ |
| hasTributary |
Lubya River
ⓘ
Nazia River ⓘ Sablinka River ⓘ
linked to:
Syas River
Tigoda River (upper basin connection) ⓘ |
| hasWaterfall | Sablinka waterfall (on tributary near confluence) ⓘ |
| length | 121 km ⓘ |
| locatedIn |
Leningrad Oblast
ⓘ
northwestern Russia ⓘ |
| mouth | Neva River ⓘ |
| mouthLocation | near Otradnoye, Leningrad Oblast ⓘ |
| namedAfter | town of Tosno ⓘ |
| partOf | Baltic Sea drainage basin ⓘ |
| region | European Russia ⓘ |
| riverSystem |
Neva River basin
ⓘ
linked to:
Neva River
|
| sourceLocation | Leningrad Oblast ⓘ |
| tributaryOf | Neva River ⓘ |
| usedFor |
angling
ⓘ
local recreation ⓘ small-scale navigation (boats) ⓘ |
| watercourseType | lowland river ⓘ |
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: Tosna River Description of subject: The Tosna River is a waterway in northwestern Russia that flows through the Leningrad Oblast before joining the Neva River.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Tosna River
linked to: Tosna River