Ontario Highway 21
E664604
Ontario Highway 21 is a provincial highway in southwestern Ontario that runs along the southeastern shore of Lake Huron, connecting several lakeside communities and inland towns.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Ontario Highway 21 canonical | 9 |
| Highway 21 (Ontario) | 2 |
| Ontario Highway 21 (nearby) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6809950 — 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: Ontario Highway 21 Context triple: [Ridgetown, roadAccess, Ontario Highway 21]
-
A.
Ontario Highway 2
Ontario Highway 2 is a historic east–west provincial highway in Ontario, Canada, that runs parallel to the north shore of Lake Ontario and Lake Erie, connecting numerous communities across southern Ontario.
-
B.
Ontario Highway 19
Ontario Highway 19 is a provincial highway in southwestern Ontario that connects several communities, including Stratford, and serves as an important regional transportation route.
-
C.
Ontario Highway 17
Ontario Highway 17 is a major provincial highway in Ontario, Canada, forming the primary east–west route across Northern Ontario and constituting the longest segment of the Trans-Canada Highway within the province.
-
D.
Ontario Highway 12
Ontario Highway 12 is a provincial highway in south-central Ontario that connects communities along the eastern shore of Lake Simcoe and serves as a key regional transportation route.
-
E.
Ontario Highway 28
Ontario Highway 28 is a provincial highway in eastern Ontario, Canada, that runs through rural communities and scenic cottage country as part of the region’s secondary highway 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: Ontario Highway 21 Target entity description: Ontario Highway 21 is a provincial highway in southwestern Ontario that runs along the southeastern shore of Lake Huron, connecting several lakeside communities and inland towns.
-
A.
Ontario Highway 2
Ontario Highway 2 is a historic east–west provincial highway in Ontario, Canada, that runs parallel to the north shore of Lake Ontario and Lake Erie, connecting numerous communities across southern Ontario.
-
B.
Ontario Highway 19
Ontario Highway 19 is a provincial highway in southwestern Ontario that connects several communities, including Stratford, and serves as an important regional transportation route.
-
C.
Ontario Highway 17
Ontario Highway 17 is a major provincial highway in Ontario, Canada, forming the primary east–west route across Northern Ontario and constituting the longest segment of the Trans-Canada Highway within the province.
-
D.
Ontario Highway 12
Ontario Highway 12 is a provincial highway in south-central Ontario that connects communities along the eastern shore of Lake Simcoe and serves as a key regional transportation route.
-
E.
Ontario Highway 28
Ontario Highway 28 is a provincial highway in eastern Ontario, Canada, that runs through rural communities and scenic cottage country as part of the region’s secondary highway network.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
Ontario provincial highway
ⓘ
provincial highway ⓘ |
| alsoKnownAs | King's Highway 21 ⓘ |
| connectsTo |
Highway 4
ⓘ
Highway 401 ⓘ Highway 402 ⓘ Highway 8 ⓘ Highway 9 ⓘ |
| country | Canada ⓘ |
| followsShoreOf | Lake Huron ⓘ |
| hasDirection |
northwest–southeast
ⓘ
north–south ⓘ |
| locatedIn | Ontario ⓘ |
| maintainedBy |
Ministry of Transportation of Ontario
ⓘ
linked to:
Ministry of Transportation (Ontario)
|
| partOf | provincial highway network of Ontario ⓘ |
| passesNear | Sarnia ⓘ |
| passesThrough |
Bayfield, Ontario
ⓘ
Bruce County ⓘ Forest, Ontario ⓘ Goderich, Ontario ⓘ Grand Bend, Ontario ⓘ Huron County ⓘ Kincardine, Ontario ⓘ Lambton County ⓘ Owen Sound, Ontario ⓘ
linked to:
Owen Sound
Port Elgin, Ontario ⓘ Southampton, Ontario ⓘ |
| region | Southwestern Ontario ⓘ |
| routeType | two-lane highway ⓘ |
| serves |
inland towns in Southwestern Ontario
ⓘ
lakeside communities on Lake Huron ⓘ |
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: Ontario Highway 21 Description of subject: Ontario Highway 21 is a provincial highway in southwestern Ontario that runs along the southeastern shore of Lake Huron, connecting several lakeside communities and inland towns.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Owen Sound, Ontario, Canada
linked to: Ontario Highway 21
linked to: Ontario Highway 21
subject linked to:
Highway 6
linked to: Ontario Highway 21