Toronto–Sarnia line
E647282
The Toronto–Sarnia line is a major railway corridor in Ontario, Canada, connecting Toronto with the border city of Sarnia and forming an important part of the region’s passenger and freight rail network.
All labels observed (2)
| Label | Occurrences |
|---|---|
| VIA Rail Toronto–Sarnia service | 2 |
| Toronto–Sarnia line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7181538 — 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: Toronto–Sarnia line Context triple: [Grand Trunk Railway, keyRoute, Toronto–Sarnia line]
-
A.
Leamington–Stratford line
The Leamington–Stratford line is a railway route in Warwickshire, England, connecting Leamington Spa with the historic town of Stratford-upon-Avon.
-
B.
Barrie line
The Barrie line is a GO Transit commuter rail corridor in the Greater Toronto Area that runs between Toronto and the city of Barrie.
-
C.
Waterloo–Reading line
The Waterloo–Reading line is a suburban and regional railway route in southern England that connects London Waterloo with Reading, serving numerous commuter towns in Surrey and Berkshire.
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D.
Waterloo to Exeter Line
The Waterloo to Exeter Line is a major railway route in southern England connecting London with Exeter via towns in Surrey, Hampshire, and Dorset.
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E.
Stouffville line
The Stouffville line is a commuter rail corridor in the Greater Toronto Area operated by GO Transit, connecting downtown Toronto with communities to the northeast including Markham and Stouffville.
- 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: Toronto–Sarnia line Target entity description: The Toronto–Sarnia line is a major railway corridor in Ontario, Canada, connecting Toronto with the border city of Sarnia and forming an important part of the region’s passenger and freight rail network.
-
A.
Leamington–Stratford line
The Leamington–Stratford line is a railway route in Warwickshire, England, connecting Leamington Spa with the historic town of Stratford-upon-Avon.
-
B.
Barrie line
The Barrie line is a GO Transit commuter rail corridor in the Greater Toronto Area that runs between Toronto and the city of Barrie.
-
C.
Waterloo–Reading line
The Waterloo–Reading line is a suburban and regional railway route in southern England that connects London Waterloo with Reading, serving numerous commuter towns in Surrey and Berkshire.
-
D.
Waterloo to Exeter Line
The Waterloo to Exeter Line is a major railway route in southern England connecting London with Exeter via towns in Surrey, Hampshire, and Dorset.
-
E.
Stouffville line
The Stouffville line is a commuter rail corridor in the Greater Toronto Area operated by GO Transit, connecting downtown Toronto with communities to the northeast including Markham and Stouffville.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
railway corridor
ⓘ
railway line ⓘ |
| borderConnection | United States border at Sarnia ⓘ |
| connectsCity |
Sarnia
ⓘ
Toronto ⓘ |
| country | Canada ⓘ |
| hasBorderCityTerminus | Sarnia ⓘ |
| hasFunction |
connects Toronto with Sarnia
ⓘ
supports regional freight services ⓘ supports regional passenger services ⓘ |
| importance | important part of regional rail infrastructure ⓘ |
| infrastructureType | heavy rail line ⓘ |
| locatedIn | Ontario ⓘ |
| locatedInTimeZone | Eastern Time Zone ⓘ |
| partOf |
Canadian rail network
ⓘ
linked to:
Canadian transcontinental railways
Ontario rail network ⓘ
linked to:
Southern Ontario rail corridor system
|
| regionServed |
Greater Toronto and Hamilton Area
ⓘ
Southwestern Ontario ⓘ |
| significance | major railway corridor in Ontario ⓘ |
| terminus |
Sarnia
ⓘ
Toronto ⓘ |
| transportMode | rail ⓘ |
| traversesProvince | Ontario ⓘ |
| usedFor |
freight rail transport
ⓘ
passenger rail transport ⓘ |
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: Toronto–Sarnia line Description of subject: The Toronto–Sarnia line is a major railway corridor in Ontario, Canada, connecting Toronto with the border city of Sarnia and forming an important part of the region’s passenger and freight rail network.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Toronto–Sarnia line
linked to: Toronto–Sarnia line