Chirk Tunnel
E615599
Chirk Tunnel is a historic canal tunnel on the Llangollen Canal in Wales, notable for carrying the waterway beneath the Welsh–English border near Chirk Aqueduct.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Chirk Tunnel canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T6728944 — 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: Chirk Tunnel Context triple: [Chirk, hasStructure, Chirk Tunnel]
-
A.
Malpas Tunnel
Malpas Tunnel is a historic canal tunnel in southern France, notable as one of the first navigable tunnels built for the Canal du Midi in the 17th century.
-
B.
Moffat Tunnel
The Moffat Tunnel is a major railroad and water tunnel that cuts through the Continental Divide in Colorado, providing a crucial transportation and utility link between the Denver area and the western slope of the Rocky Mountains.
-
C.
Mountfield Tunnel
Mountfield Tunnel is a railway tunnel in East Sussex, England, carrying the Tonbridge–Hastings line through the countryside near the village of Mountfield.
-
D.
Bruce Tunnel
Bruce Tunnel is a historic canal tunnel in Wiltshire, England, carrying the Kennet and Avon Canal beneath Savernake Forest.
-
E.
Cosgrove Tunnel
Cosgrove Tunnel is a major water-supply conduit in Massachusetts that carries drinking water from the Wachusett Reservoir toward the Boston metropolitan area.
- 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: Chirk Tunnel Target entity description: Chirk Tunnel is a historic canal tunnel on the Llangollen Canal in Wales, notable for carrying the waterway beneath the Welsh–English border near Chirk Aqueduct.
-
A.
Malpas Tunnel
Malpas Tunnel is a historic canal tunnel in southern France, notable as one of the first navigable tunnels built for the Canal du Midi in the 17th century.
-
B.
Moffat Tunnel
The Moffat Tunnel is a major railroad and water tunnel that cuts through the Continental Divide in Colorado, providing a crucial transportation and utility link between the Denver area and the western slope of the Rocky Mountains.
-
C.
Mountfield Tunnel
Mountfield Tunnel is a railway tunnel in East Sussex, England, carrying the Tonbridge–Hastings line through the countryside near the village of Mountfield.
-
D.
Bruce Tunnel
Bruce Tunnel is a historic canal tunnel in Wiltshire, England, carrying the Kennet and Avon Canal beneath Savernake Forest.
-
E.
Cosgrove Tunnel
Cosgrove Tunnel is a major water-supply conduit in Massachusetts that carries drinking water from the Wachusett Reservoir toward the Boston metropolitan area.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
canal tunnel
ⓘ
transport infrastructure ⓘ |
| builtFor | Ellesmere Canal NERFINISHED ⓘ |
| builtForPurpose | commercial canal transport ⓘ |
| connectsSectionOf | Llangollen Canal between Chirk Aqueduct and Whitehouses Tunnel ⓘ |
| constructionEnd | 1802 ⓘ |
| constructionStart | 1794 ⓘ |
| country | United Kingdom ⓘ |
| crossesUnder | Welsh–English border NERFINISHED ⓘ |
| currentPrimaryUse | recreational boating ⓘ |
| distanceFrom | approximately 150 metres from Chirk Aqueduct ⓘ |
| engineer |
Thomas Telford
NERFINISHED
ⓘ
William Jessop NERFINISHED ⓘ |
| hasFeature | arched brick lining ⓘ |
| hasLighting | no fixed lighting ⓘ |
| hasNavigationRestriction | one-way working by informal agreement ⓘ |
| hasPortal |
eastern portal
ⓘ
western portal ⓘ |
| hasTowpath | true ⓘ |
| hasTowpathAccess | both portals ⓘ |
| hasTowpathUse |
cycling
ⓘ
walking ⓘ |
| heritageStatus | part of Pontcysyllte Aqueduct and Canal World Heritage Site buffer zone ⓘ |
| historicalPeriod | Industrial Revolution NERFINISHED ⓘ |
| isHistoric | true ⓘ |
| length |
421 metres
ⓘ
460 yards ⓘ |
| locatedIn |
Wales
ⓘ
Wrexham County Borough NERFINISHED ⓘ |
| locatedInRegion | border between Wales and England ⓘ |
| locatedNear | Chirk NERFINISHED ⓘ |
| locatedOnWaterway | Llangollen Canal NERFINISHED ⓘ |
| material |
brick
ⓘ
stone ⓘ |
| navigationAuthority | Canal & River Trust NERFINISHED ⓘ |
| near | Chirk Aqueduct NERFINISHED ⓘ |
| opened | 1802 ⓘ |
| orientation | roughly east–west ⓘ |
| owner | Canal & River Trust NERFINISHED ⓘ |
| partOf | Llangollen Canal NERFINISHED ⓘ |
| passesUnder | hillside near Chirk ⓘ |
| status | in use ⓘ |
| towpathLocation | north side ⓘ |
| usedFor |
leisure boating
ⓘ
narrowboat navigation ⓘ |
| waterwayType | navigable canal ⓘ |
| worldHeritageContext | Pontcysyllte Aqueduct and Canal 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: Chirk Tunnel Description of subject: Chirk Tunnel is a historic canal tunnel on the Llangollen Canal in Wales, notable for carrying the waterway beneath the Welsh–English border near Chirk Aqueduct.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.