Snowdon Mountain Railway
E240834
Snowdon Mountain Railway is a historic narrow-gauge rack and pinion railway in Wales that carries passengers from Llanberis to near the summit of Mount Snowdon.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Snowdon Mountain Railway canonical | 6 |
| Snowdon Mountain Railway Ltd | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2156607 — 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: Snowdon Mountain Railway Context triple: [Snowdonia, contains, Snowdon Mountain Railway]
-
A.
Ffestiniog Railway
Ffestiniog Railway is a historic narrow-gauge heritage railway in North Wales, renowned as one of the oldest independent railway companies in the world and a popular tourist attraction through the Snowdonia landscape.
-
B.
Conwy Valley Line
The Conwy Valley Line is a scenic railway route in North Wales that runs through the Conwy Valley from the coast into the Snowdonia National Park.
-
C.
Talyllyn Railway
Talyllyn Railway is a historic narrow-gauge heritage railway in Wales, renowned as the world’s first preserved railway to be operated primarily by volunteers.
-
D.
Heart of Wales Line
The Heart of Wales Line is a scenic rural railway route in Wales and the English borderlands, known for its picturesque landscapes, small request-stop stations, and leisurely services connecting Swansea and Shrewsbury.
-
E.
Snaefell Mountain Railway
The Snaefell Mountain Railway is a historic electric mountain railway on the Isle of Man that carries passengers from Laxey to the summit of Snaefell, the island’s highest peak.
- 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: Snowdon Mountain Railway Target entity description: Snowdon Mountain Railway is a historic narrow-gauge rack and pinion railway in Wales that carries passengers from Llanberis to near the summit of Mount Snowdon.
-
A.
Ffestiniog Railway
Ffestiniog Railway is a historic narrow-gauge heritage railway in North Wales, renowned as one of the oldest independent railway companies in the world and a popular tourist attraction through the Snowdonia landscape.
-
B.
Conwy Valley Line
The Conwy Valley Line is a scenic railway route in North Wales that runs through the Conwy Valley from the coast into the Snowdonia National Park.
-
C.
Talyllyn Railway
Talyllyn Railway is a historic narrow-gauge heritage railway in Wales, renowned as the world’s first preserved railway to be operated primarily by volunteers.
-
D.
Heart of Wales Line
The Heart of Wales Line is a scenic rural railway route in Wales and the English borderlands, known for its picturesque landscapes, small request-stop stations, and leisurely services connecting Swansea and Shrewsbury.
-
E.
Snaefell Mountain Railway
The Snaefell Mountain Railway is a historic electric mountain railway on the Isle of Man that carries passengers from Laxey to the summit of Snaefell, the island’s highest peak.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
mountain railway
ⓘ
narrow-gauge railway ⓘ rack railway ⓘ tourist railway ⓘ |
| constructionStarted | 1894 ⓘ |
| country |
United Kingdom
ⓘ
Wales ⓘ |
| elevationGain |
about 1,000 m
ⓘ
about 3,300 ft ⓘ |
| gauge |
2 ft 7 1⁄2 in
ⓘ
800 mm ⓘ |
| hasFeature |
diesel locomotives
ⓘ
special rack rail in centre of track ⓘ steam locomotives ⓘ |
| hasStation |
Clogwyn station
ⓘ
Halfway station ⓘ Llanberis station ⓘ Rocky Valley station ⓘ Snowdon Summit station ⓘ |
| heritageDesignation | heritage railway ⓘ |
| languageOfSignage |
English
ⓘ
Welsh ⓘ |
| length |
approximately 4.7 miles
ⓘ
approximately 7.6 km ⓘ |
| locatedIn |
Gwynedd
ⓘ
Llanberis ⓘ Snowdonia ⓘ
surface form:
Snowdonia National Park
|
| lowerElevation | Llanberis ⓘ |
| notableFor |
being the only public rack railway in the United Kingdom
ⓘ
scenic views of Snowdonia ⓘ |
| opened | 1896 ⓘ |
| openedForPassengers | 1896 ⓘ |
| operator |
Snowdon Mountain Railway
self-linksurface differs
ⓘ
surface form:
Snowdon Mountain Railway Ltd
|
| owner | Heritage Great Britain PLC ⓘ |
| primaryUse |
passenger transport
ⓘ
tourism ⓘ |
| propulsion | adhesion and rack ⓘ |
| rackSystem | Abt rack system ⓘ |
| safetySystem | rack and pinion braking ⓘ |
| seasonalOperation | operates mainly in spring and summer ⓘ |
| serves |
Snowdon
ⓘ
surface form:
Mount Snowdon
|
| status | operational ⓘ |
| terminus |
Llanberis station
ⓘ
Snowdon Summit station ⓘ |
| touristAttractionIn | Wales ⓘ |
| trackConfiguration | single track with passing loops ⓘ |
| upperElevation | near the summit of Snowdon ⓘ |
| website | https://www.snowdonrailway.co.uk/ ⓘ |
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: Snowdon Mountain Railway Description of subject: Snowdon Mountain Railway is a historic narrow-gauge rack and pinion railway in Wales that carries passengers from Llanberis to near the summit of Mount Snowdon.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Snowdon Mountain Railway Ltd