Severn River (Ontario)
E670919
Severn River (Ontario) is a waterway in central Ontario that connects Lake Couchiching to Georgian Bay and forms part of the Trent–Severn Waterway.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Severn River (Ontario) canonical | 3 |
| Severn River (Ontario) basin | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7532954 — 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: Severn River (Ontario) Context triple: [Severn Canal, namedAfter, Severn River (Ontario)]
-
A.
Scugog River
Scugog River is a waterway in the Kawartha Lakes region of Ontario, Canada, that connects Lake Scugog to the Kawartha lake system and forms part of the Trent–Severn Waterway.
-
B.
Welland River
The Welland River is a tributary of the Niagara River in Ontario, Canada, flowing through the Niagara Peninsula and intersecting key regional waterways and infrastructure.
-
C.
Thames River (Ontario)
The Thames River in Ontario is a major waterway in southwestern Ontario that flows through cities like London, supporting recreation, wildlife habitats, and local parks along its banks.
-
D.
Maitland River (Ontario)
The Maitland River is a significant waterway in southwestern Ontario, Canada, flowing generally westward and emptying into Lake Huron near the town of Goderich.
-
E.
Ausable River (Ontario)
The Ausable River in Ontario is a river in southwestern Ontario known for its winding course through agricultural lands and conservation areas before emptying into Lake Huron.
- 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: Severn River (Ontario) Target entity description: Severn River (Ontario) is a waterway in central Ontario that connects Lake Couchiching to Georgian Bay and forms part of the Trent–Severn Waterway.
-
A.
Scugog River
Scugog River is a waterway in the Kawartha Lakes region of Ontario, Canada, that connects Lake Scugog to the Kawartha lake system and forms part of the Trent–Severn Waterway.
-
B.
Welland River
The Welland River is a tributary of the Niagara River in Ontario, Canada, flowing through the Niagara Peninsula and intersecting key regional waterways and infrastructure.
-
C.
Thames River (Ontario)
The Thames River in Ontario is a major waterway in southwestern Ontario that flows through cities like London, supporting recreation, wildlife habitats, and local parks along its banks.
-
D.
Maitland River (Ontario)
The Maitland River is a significant waterway in southwestern Ontario, Canada, flowing generally westward and emptying into Lake Huron near the town of Goderich.
-
E.
Ausable River (Ontario)
The Ausable River in Ontario is a river in southwestern Ontario known for its winding course through agricultural lands and conservation areas before emptying into Lake Huron.
- F. None of above. chosen
Statements (36)
| Predicate | Object |
|---|---|
| instanceOf | river ⓘ |
| basinCountry | Canada ⓘ |
| connects |
Georgian Bay
NERFINISHED
ⓘ
Lake Couchiching NERFINISHED ⓘ |
| country | Canada ⓘ |
| crosses |
Township of Georgian Bay
NERFINISHED
ⓘ
Township of Severn NERFINISHED ⓘ |
| drainageBasin | Lake Huron drainage basin ⓘ |
| flowsFrom | Lake Couchiching NERFINISHED ⓘ |
| flowsInto | Georgian Bay NERFINISHED ⓘ |
| hasBridge |
Canadian Pacific Railway bridge
NERFINISHED
ⓘ
Highway 400 bridge NERFINISHED ⓘ |
| hasCommunityOnShore |
Big Chute
NERFINISHED
ⓘ
Port Severn NERFINISHED ⓘ Severn Falls NERFINISHED ⓘ |
| hasFeature |
channels
ⓘ
islands ⓘ locks ⓘ rapids ⓘ |
| hasLock |
Big Chute Marine Railway
NERFINISHED
ⓘ
Swift Rapids Lock 43 NERFINISHED ⓘ |
| locatedIn |
Ontario
ⓘ
central Ontario NERFINISHED ⓘ |
| mouthLocatedIn |
Georgian Bay
NERFINISHED
ⓘ
Lake Huron NERFINISHED ⓘ |
| namedAfter | River Severn (United Kingdom) NERFINISHED ⓘ |
| near |
Port Severn
NERFINISHED
ⓘ
Washago NERFINISHED ⓘ |
| partOf |
Great Lakes watershed
NERFINISHED
ⓘ
Trent–Severn Waterway NERFINISHED ⓘ |
| region |
Muskoka District Municipality
NERFINISHED
ⓘ
Simcoe County NERFINISHED ⓘ |
| usedFor |
cottage recreation
ⓘ
recreational boating ⓘ sport fishing ⓘ |
| waterwaySystem | Great Lakes–St. Lawrence basin NERFINISHED ⓘ |
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: Severn River (Ontario) Description of subject: Severn River (Ontario) is a waterway in central Ontario that connects Lake Couchiching to Georgian Bay and forms part of the Trent–Severn Waterway.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Black River (Ontario)
this entity surface form:
Severn River (Ontario) basin