St. Clair Tunnel (rail, nearby under river)
E336387
The St. Clair Tunnel is a historic railway tunnel beneath the St. Clair River that provides a vital cross-border rail link between Canada and the United States.
All labels observed (1)
| Label | Occurrences |
|---|---|
| St. Clair Tunnel (rail, nearby under river) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3187898 — 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: St. Clair Tunnel (rail, nearby under river) Context triple: [St. Clair River, crossedBy, St. Clair Tunnel (rail, nearby under river)]
-
A.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
-
B.
Brockville Railway Tunnel
The Brockville Railway Tunnel is Canada's oldest railway tunnel, a historic 19th-century stone passage beneath downtown Brockville that now serves as a popular illuminated pedestrian attraction.
-
C.
Coen Tunnel (via connected waterways)
The Coen Tunnel is a major road tunnel in Amsterdam that facilitates traffic flow beneath the waterways connecting the IJ Bay with the city’s western districts.
-
D.
Detroit–Windsor Tunnel
The Detroit–Windsor Tunnel is an underwater vehicular tunnel beneath the Detroit River that connects the cities of Detroit, Michigan, and Windsor, Ontario, serving as a major international border crossing between the United States and Canada.
-
E.
George Massey Tunnel
The George Massey Tunnel is a highway traffic tunnel in British Columbia, Canada, that carries vehicles beneath the Fraser River between Richmond and Delta.
- 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: St. Clair Tunnel (rail, nearby under river) Target entity description: The St. Clair Tunnel is a historic railway tunnel beneath the St. Clair River that provides a vital cross-border rail link between Canada and the United States.
-
A.
Clyde Tunnel
The Clyde Tunnel is a road tunnel in Glasgow, Scotland, carrying vehicular traffic beneath the River Clyde to connect the city’s north and south banks.
-
B.
Brockville Railway Tunnel
The Brockville Railway Tunnel is Canada's oldest railway tunnel, a historic 19th-century stone passage beneath downtown Brockville that now serves as a popular illuminated pedestrian attraction.
-
C.
Coen Tunnel (via connected waterways)
The Coen Tunnel is a major road tunnel in Amsterdam that facilitates traffic flow beneath the waterways connecting the IJ Bay with the city’s western districts.
-
D.
Detroit–Windsor Tunnel
The Detroit–Windsor Tunnel is an underwater vehicular tunnel beneath the Detroit River that connects the cities of Detroit, Michigan, and Windsor, Ontario, serving as a major international border crossing between the United States and Canada.
-
E.
George Massey Tunnel
The George Massey Tunnel is a highway traffic tunnel in British Columbia, Canada, that carries vehicles beneath the Fraser River between Richmond and Delta.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
cross-border transportation infrastructure
ⓘ
railway tunnel ⓘ subaqueous tunnel ⓘ |
| connects |
Canada
ⓘ
United States of America ⓘ
surface form:
United States
|
| continent | North America ⓘ |
| country |
Canada
ⓘ
United States of America ⓘ
surface form:
United States
|
| crosses | St. Clair River ⓘ |
| function | international rail freight corridor ⓘ |
| gauge | standard gauge ⓘ |
| heritageStatus | historic railway tunnel ⓘ |
| locatedIn |
Port Huron, Michigan, United States
ⓘ
surface form:
Port Huron, Michigan
Sarnia ⓘ
surface form:
Sarnia, Ontario
|
| locatedOnBorderBetween |
Michigan
ⓘ
Ontario ⓘ |
| locatedUnder | St. Clair River ⓘ |
| operator | Canadian National Railway ⓘ |
| partOf | Canada–United States border crossing infrastructure ⓘ |
| significance | vital cross-border rail link between Canada and the United States ⓘ |
| status | in use ⓘ |
| transportMode | freight rail ⓘ |
| tunnelType | rail tunnel ⓘ |
| underlies | international boundary between Canada and the United States ⓘ |
| use | 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: St. Clair Tunnel (rail, nearby under river) Description of subject: The St. Clair Tunnel is a historic railway tunnel beneath the St. Clair River that provides a vital cross-border rail link between Canada and the United States.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.