Brockville Railway Tunnel
E248978
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Brockville Railway Tunnel canonical | 3 |
| Brockville Railway Tunnel lighted walkway | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2254691 — 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: Brockville Railway Tunnel Context triple: [Brockville, hasAttraction, Brockville Railway Tunnel]
-
A.
Robertson Tunnel
Robertson Tunnel is a major light rail tunnel in Portland, Oregon, carrying MAX trains through the West Hills between downtown and the city’s western suburbs.
-
B.
Shandaken Tunnel
The Shandaken Tunnel is an aqueduct in New York State that diverts water from the Schoharie Reservoir to the Esopus Creek as part of the New York City water supply system.
-
C.
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.
-
D.
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.
-
E.
Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
- 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: Brockville Railway Tunnel Target entity description: 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.
-
A.
Robertson Tunnel
Robertson Tunnel is a major light rail tunnel in Portland, Oregon, carrying MAX trains through the West Hills between downtown and the city’s western suburbs.
-
B.
Shandaken Tunnel
The Shandaken Tunnel is an aqueduct in New York State that diverts water from the Schoharie Reservoir to the Esopus Creek as part of the New York City water supply system.
-
C.
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.
-
D.
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.
-
E.
Malinta Tunnel
Malinta Tunnel is a historic underground complex on Corregidor Island in the Philippines that served as a bomb-proof headquarters and hospital for American and Filipino forces during World War II.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
historic site
ⓘ
railway tunnel ⓘ tourist attraction ⓘ |
| constructionMaterial |
brick lining
ⓘ
stone ⓘ |
| constructionStartDate | 1854 ⓘ |
| country | Canada ⓘ |
| currentUse |
pedestrian tunnel
ⓘ
tourist attraction ⓘ |
| feature |
LED light show
ⓘ
interpretive panels ⓘ sound effects ⓘ |
| hasCrossSectionShape | arched ⓘ |
| hasLightingSystem | programmable LED lights ⓘ |
| hasNearbyLandmark |
Brockville City Hall
ⓘ
St. Lawrence River ⓘ
linked to:
Saint Lawrence River
|
| hasSeasonalOperation | open seasonally to the public ⓘ |
| hasSurfaceCondition | damp rock walls ⓘ |
| hasVentilationFeature | vertical shafts ⓘ |
| heritageDesignation | Canada’s oldest railway tunnel ⓘ |
| historicalEra | 19th century ⓘ |
| isFirstOfItsKindIn | Canada ⓘ |
| isMaintainedBy |
City of Brockville
ⓘ
linked to:
Brockville
|
| laterOperator | Canadian Pacific Railway ⓘ |
| length |
about 1,730 feet
ⓘ
about 527 metres ⓘ |
| locatedIn |
Brockville
ⓘ
Ontario ⓘ |
| locatedUnder | downtown Brockville ⓘ |
| northernTerminus | former Grand Trunk Railway line ⓘ |
| openingDate | 1860 ⓘ |
| originalOperator | Brockville and Ottawa Railway ⓘ |
| owner |
City of Brockville
ⓘ
linked to:
Brockville
|
| partOf | Brockville waterfront trail system ⓘ |
| passesUnder |
City Hall
ⓘ
King Street ⓘ |
| publicAccess | pedestrian ⓘ |
| purpose | to connect Brockville waterfront with the Brockville and Ottawa Railway ⓘ |
| railTrafficEndDate | 1970s ⓘ |
| renovationCompletionDate | 2017 ⓘ |
| reopeningDateAsAttraction | 2017 ⓘ |
| southernTerminus |
Brockville waterfront
ⓘ
linked to:
Brockville waterfront trail system
|
| status | no longer used for rail traffic ⓘ |
| tourismCategory |
adaptive reuse infrastructure project
ⓘ
industrial heritage attraction ⓘ |
| trackGauge | standard gauge ⓘ |
| website | https://brockvillerailwaytunnel.com ⓘ |
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: Brockville Railway Tunnel Description of subject: 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.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Brockville Railway Tunnel