Simplon Tunnel
E396158
The Simplon Tunnel is a major railway tunnel beneath the Alps connecting Switzerland and Italy, historically significant as one of the longest and most important transalpine rail routes.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Simplon Tunnel canonical | 9 |
| Simplon Tunnel I | 1 |
| Simplon Tunnel II | 1 |
| Simplon rail tunnel area | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3862440 — 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: Simplon Tunnel Context triple: [Simplon Pass, hasTunnel, Simplon Tunnel]
-
A.
Mont Blanc Tunnel
The Mont Blanc Tunnel is a major trans-Alpine road tunnel linking France and Italy beneath the Mont Blanc massif, serving as a key route for international traffic through the Alps.
-
B.
Great St Bernard Tunnel
The Great St Bernard Tunnel is a major road tunnel through the Alps that provides a year-round transalpine route between Switzerland and Italy beneath the Great St Bernard Pass.
-
C.
Gotthard
Gotthard is a masculine given name of Germanic origin, historically borne by several notable figures including military leaders and saints.
-
D.
Fréjus Rail Tunnel
The Fréjus Rail Tunnel is a major Alpine railway tunnel linking France and Italy, playing a key role in trans-European rail transport.
-
E.
Fréjus Road Tunnel
The Fréjus Road Tunnel is a major trans-Alpine highway tunnel linking France and Italy through the Alps, serving as an important route for international road traffic.
- 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: Simplon Tunnel Target entity description: The Simplon Tunnel is a major railway tunnel beneath the Alps connecting Switzerland and Italy, historically significant as one of the longest and most important transalpine rail routes.
-
A.
Mont Blanc Tunnel
The Mont Blanc Tunnel is a major trans-Alpine road tunnel linking France and Italy beneath the Mont Blanc massif, serving as a key route for international traffic through the Alps.
-
B.
Great St Bernard Tunnel
The Great St Bernard Tunnel is a major road tunnel through the Alps that provides a year-round transalpine route between Switzerland and Italy beneath the Great St Bernard Pass.
-
C.
Gotthard
Gotthard is a masculine given name of Germanic origin, historically borne by several notable figures including military leaders and saints.
-
D.
Fréjus Rail Tunnel
The Fréjus Rail Tunnel is a major Alpine railway tunnel linking France and Italy, playing a key role in trans-European rail transport.
-
E.
Fréjus Road Tunnel
The Fréjus Road Tunnel is a major trans-Alpine highway tunnel linking France and Italy through the Alps, serving as an important route for international road traffic.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Alpine tunnel
ⓘ
railway tunnel ⓘ railway tunnel ⓘ railway tunnel ⓘ |
| builder | Alfred Brandt ⓘ |
| category |
Railway tunnels in Italy
ⓘ
Railway tunnels in Switzerland ⓘ Tunnels under the Alps ⓘ |
| connects |
Brig
ⓘ
Domodossola ⓘ Italy ⓘ Switzerland ⓘ |
| constructionMethod |
compressed air drilling
ⓘ
percussion drilling ⓘ |
| constructionStartDate | 1898 ⓘ |
| country |
Italy
ⓘ
Switzerland ⓘ |
| crossesBorder |
Swiss–Italian border
ⓘ
linked to:
Italian–Swiss border
|
| electrification |
15 kV 16.7 Hz AC
ⓘ
overhead line ⓘ |
| elevation | low-level base tunnel ⓘ |
| engineer | Alfred Brandt ⓘ |
| gauge | standard gauge ⓘ |
| hasPart |
Simplon Tunnel I
ⓘ
linked to:
Simplon Tunnel
Simplon Tunnel II ⓘ
linked to:
Simplon Tunnel
|
| historicalSignificance |
first long base tunnel under the Alps
ⓘ
one of the longest railway tunnels in the world at its opening ⓘ |
| inaugurationDate | 1906 ⓘ |
| length |
about 12.3 miles
ⓘ
approximately 19.8 km ⓘ |
| locatedIn |
Alps
ⓘ
Piedmont ⓘ canton of Valais ⓘ
linked to:
Canton of Valais
|
| locatedNear |
Brig railway station
ⓘ
Domodossola railway station ⓘ |
| namedAfter | Simplon Pass ⓘ |
| numberOfTracks | 2 ⓘ |
| openingDate | 1906-05-19 ⓘ |
| operator | Swiss Federal Railways ⓘ |
| partOf |
Simplon railway line
ⓘ
transalpine rail route ⓘ |
| passesUnder | Simplon Pass ⓘ |
| status | in use ⓘ |
| trackOwner | Swiss Federal Railways ⓘ |
| usedBy |
EuroCity services
ⓘ
linked to:
EuroCity trains
freight trains between northern Europe and Italy ⓘ international trains ⓘ |
| usedFor |
freight rail traffic
ⓘ
passenger rail traffic ⓘ |
| ventilationSystem | central ventilation gallery ⓘ |
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: Simplon Tunnel Description of subject: The Simplon Tunnel is a major railway tunnel beneath the Alps connecting Switzerland and Italy, historically significant as one of the longest and most important transalpine rail routes.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Simplon Tunnel
linked to: Simplon Tunnel
subject linked to:
Brig, Valais, Switzerland
linked to: Simplon Tunnel