A18 Mountain Road
E121835
A18 Mountain Road is a notable mountain pass route on the Isle of Man, famed for forming part of the Snaefell Mountain Course used in the Isle of Man TT motorcycle races.
All labels observed (2)
| Label | Occurrences |
|---|---|
| A18 Mountain Road canonical | 2 |
| Mountain Road | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T955326 — 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: A18 Mountain Road Context triple: [Snaefell, hasRoadCrossing, A18 Mountain Road]
-
A.
Mineral King Road
Mineral King Road is a narrow, winding mountain road in California’s Sierra Nevada that provides vehicle access to the remote Mineral King valley in Sequoia National Park.
-
B.
Great Woods Road
Great Woods Road is a notable roadway and trail within the Lynn Woods Reservation in Lynn, Massachusetts, providing access through the forested parkland.
-
C.
Whitney Portal Road
Whitney Portal Road is a scenic mountain road in California that climbs from the Owens Valley to the trailhead and campground area at the base of Mount Whitney.
-
D.
Moro Rock–Crescent Meadow Road
Moro Rock–Crescent Meadow Road is a scenic mountain road in Sequoia National Park, California, that winds through giant sequoia groves and leads to popular destinations such as Moro Rock and Crescent Meadow.
-
E.
Nobles Trail
Nobles Trail was a historic wagon route used by 19th-century emigrants traveling to northern California, serving as an alternative path within the larger California Trail network.
- 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: A18 Mountain Road Target entity description: A18 Mountain Road is a notable mountain pass route on the Isle of Man, famed for forming part of the Snaefell Mountain Course used in the Isle of Man TT motorcycle races.
-
A.
Mineral King Road
Mineral King Road is a narrow, winding mountain road in California’s Sierra Nevada that provides vehicle access to the remote Mineral King valley in Sequoia National Park.
-
B.
Great Woods Road
Great Woods Road is a notable roadway and trail within the Lynn Woods Reservation in Lynn, Massachusetts, providing access through the forested parkland.
-
C.
Whitney Portal Road
Whitney Portal Road is a scenic mountain road in California that climbs from the Owens Valley to the trailhead and campground area at the base of Mount Whitney.
-
D.
Moro Rock–Crescent Meadow Road
Moro Rock–Crescent Meadow Road is a scenic mountain road in Sequoia National Park, California, that winds through giant sequoia groves and leads to popular destinations such as Moro Rock and Crescent Meadow.
-
E.
Nobles Trail
Nobles Trail was a historic wagon route used by 19th-century emigrants traveling to northern California, serving as an alternative path within the larger California Trail network.
- F. None of above. chosen
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf |
mountain pass road
ⓘ
public highway ⓘ |
| closedFor |
Isle of Man TT motorcycle races
ⓘ
surface form:
Isle of Man TT races
Isle of Man TT motorcycle races ⓘ
surface form:
Manx Grand Prix races
|
| country |
Isle of Man (crown dependency)
ⓘ
surface form:
Isle of Man
|
| followsBetween |
Douglas
ⓘ
Ramsey ⓘ |
| formsPartOf | Snaefell Mountain Course ⓘ |
| hasFeature |
open moorland sections
ⓘ
sharp bends ⓘ steep gradients ⓘ |
| hasSectionName |
Bungalow
ⓘ
Mountain Box ⓘ Mountain Mile ⓘ Verandah ⓘ |
| hasViewOf |
Irish Sea
ⓘ
central Isle of Man hills ⓘ |
| historicalUse | early motor racing on the Isle of Man ⓘ |
| locatedIn |
Isle of Man (crown dependency)
ⓘ
surface form:
Isle of Man
|
| maintainedBy | Isle of Man Department of Infrastructure ⓘ |
| near |
Snaefell Mountain Railway
ⓘ
surface form:
Snaefell Mountain Railway at Bungalow
|
| notableFor |
high-speed motorcycle racing
ⓘ
mountainous terrain ⓘ |
| partOf | primary road network of the Isle of Man ⓘ |
| partOfRaceCourseSince | 1911 ⓘ |
| passesNear | Snaefell ⓘ |
| passesThrough |
Snaefell
ⓘ
surface form:
Snaefell Mountain
|
| popularWith |
motorcyclists
ⓘ
tourists ⓘ |
| roadNumber | A18 ⓘ |
| roadType | A-road ⓘ |
| safetyConcerns |
adverse weather conditions
ⓘ
high crosswinds ⓘ low visibility fog ⓘ |
| speedLimit | national speed limit (Isle of Man, largely derestricted) ⓘ |
| surface | asphalt ⓘ |
| usedFor |
Isle of Man TT motorcycle races
ⓘ
surface form:
Isle of Man TT
Isle of Man TT motorcycle races ⓘ
surface form:
Manx Grand Prix
|
| usedSince | late 19th century ⓘ |
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: A18 Mountain Road Description of subject: A18 Mountain Road is a notable mountain pass route on the Isle of Man, famed for forming part of the Snaefell Mountain Course used in the Isle of Man TT motorcycle races.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Mountain Road