Fréjus Rail Tunnel
E32513
The Fréjus Rail Tunnel is a major Alpine railway tunnel linking France and Italy, playing a key role in trans-European rail transport.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Fréjus Rail Tunnel canonical | 13 |
| Fréjus Pass | 2 |
| Fréjus Rail Tunnel French portal | 1 |
| Mont Cenis Tunnel | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T238755 — 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: Fréjus Rail Tunnel Context triple: [French–Italian border, crosses, Fréjus Rail Tunnel]
-
A.
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.
-
B.
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.
-
C.
Channel Tunnel
The Channel Tunnel is a 50-kilometer undersea rail tunnel linking the United Kingdom and France, serving as a major passenger and freight transport route between the two countries.
-
D.
Pont du Mont-Blanc
Pont du Mont-Blanc is a major bridge in Geneva, Switzerland, spanning the Rhône at the outlet of Lake Geneva and serving as a central traffic artery with views of the city’s famous lakeside landmarks.
-
E.
Geneva–Lyon railway
The Geneva–Lyon railway is an international rail line linking the Swiss city of Geneva with Lyon in France, serving as a key passenger and freight corridor between the two countries.
- 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: Fréjus Rail Tunnel Target entity description: The Fréjus Rail Tunnel is a major Alpine railway tunnel linking France and Italy, playing a key role in trans-European rail transport.
-
A.
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.
-
B.
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.
-
C.
Channel Tunnel
The Channel Tunnel is a 50-kilometer undersea rail tunnel linking the United Kingdom and France, serving as a major passenger and freight transport route between the two countries.
-
D.
Pont du Mont-Blanc
Pont du Mont-Blanc is a major bridge in Geneva, Switzerland, spanning the Rhône at the outlet of Lake Geneva and serving as a central traffic artery with views of the city’s famous lakeside landmarks.
-
E.
Geneva–Lyon railway
The Geneva–Lyon railway is an international rail line linking the Swiss city of Geneva with Lyon in France, serving as a key passenger and freight corridor between the two countries.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Alpine tunnel
ⓘ
international railway infrastructure ⓘ railway tunnel ⓘ |
| alsoKnownAs |
Mont Cenis Tunnel
ⓘ
linked to:
Fréjus Rail Tunnel
|
| belongsToCorridor |
TEN-T core network
ⓘ
linked to:
Trans-European transport network
|
| borderCrossingType | rail border crossing ⓘ |
| connects |
Bardonecchia
ⓘ
France ⓘ Italy ⓘ Modane ⓘ |
| constructionStart | 1857 ⓘ |
| constructionTechnique | drilled from both ends ⓘ |
| continent | Europe ⓘ |
| country |
France
ⓘ
Italy ⓘ |
| crosses | Franco-Italian border ⓘ |
| electrification | electrified ⓘ |
| engineeringMethod | pioneering use of pneumatic drilling ⓘ |
| gauge | standard gauge ⓘ |
| hasParallelInfrastructure | Fréjus Road Tunnel ⓘ |
| historicalSignificance | one of the earliest major Alpine rail tunnels ⓘ |
| importance | key link between France and northern Italy ⓘ |
| length | about 13.7 km ⓘ |
| line | Turin–Modane railway ⓘ |
| locatedIn | Alps ⓘ |
| locatedInMountainRange | Cottian Alps ⓘ |
| locatedUnder | Col du Fréjus area ⓘ |
| namedAfter |
Fréjus area
ⓘ
linked to:
Saint-Tropez
|
| opened | 1871 ⓘ |
| openedBy |
Kingdom of Italy
ⓘ
Second French Empire ⓘ
linked to:
Second Empire of France
|
| operator |
Rete Ferroviaria Italiana
ⓘ
SNCF ⓘ |
| originalPurpose | improve rail connection between France and Italy ⓘ |
| partOf |
Lyon–Turin rail axis
ⓘ
trans-European rail network ⓘ
linked to:
Trans-European transport network
|
| passesThrough |
Bardonecchia (Italy)
ⓘ
linked to:
Bardonecchia
Modane (France) ⓘ
linked to:
Modane
|
| region |
Auvergne-Rhône-Alpes
ⓘ
linked to:
Auvergne-Rhône-Alpes region
Piedmont ⓘ |
| role |
important passenger link between Lyon and Turin
ⓘ
major Alpine rail freight route ⓘ |
| safetyUpgrades | subject to modernization and safety works ⓘ |
| status | in operation ⓘ |
| trackConfiguration | double track ⓘ |
| trafficType | mixed traffic ⓘ |
| usedFor |
freight rail transport
ⓘ
passenger rail transport ⓘ |
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: Fréjus Rail Tunnel Description of subject: The Fréjus Rail Tunnel is a major Alpine railway tunnel linking France and Italy, playing a key role in trans-European rail transport.
Referenced by (17)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Fréjus Rail Tunnel
linked to: Fréjus Rail Tunnel
linked to: Fréjus Rail Tunnel
linked to: Fréjus Rail Tunnel