Saumur railway tunnel
E488579
The Saumur railway tunnel is a strategic rail tunnel in western France that became historically notable when it was successfully attacked by RAF Tallboy bombs during World War II.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Saumur railway tunnel canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5035755 — 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: Saumur railway tunnel Context triple: [Tallboy bomb, notableTarget, Saumur railway tunnel]
-
A.
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.
-
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.
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.
-
D.
Paris–Nantes railway
The Paris–Nantes railway is a major French rail line connecting the capital Paris with the city of Nantes in western France, serving as an important corridor for both passenger and freight transport.
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E.
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.
- 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: Saumur railway tunnel Target entity description: The Saumur railway tunnel is a strategic rail tunnel in western France that became historically notable when it was successfully attacked by RAF Tallboy bombs during World War II.
-
A.
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.
-
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.
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.
-
D.
Paris–Nantes railway
The Paris–Nantes railway is a major French rail line connecting the capital Paris with the city of Nantes in western France, serving as an important corridor for both passenger and freight transport.
-
E.
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.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
railway tunnel
ⓘ
transport infrastructure ⓘ |
| attackDate | 1944 ⓘ |
| attackedBy | Royal Air Force NERFINISHED ⓘ |
| attackedWith | Tallboy bomb NERFINISHED ⓘ |
| attackOutcome | successfully damaged ⓘ |
| conflict | World War II ⓘ |
| country | France ⓘ |
| crosses | Loire Valley area NERFINISHED ⓘ |
| era | 20th century ⓘ |
| hasTransportMode | rail ⓘ |
| historicalSignificance | target of RAF Tallboy bombing in World War II ⓘ |
| isOnRoute | rail line along the Loire ⓘ |
| locatedIn |
Maine-et-Loire
NERFINISHED
ⓘ
Pays de la Loire NERFINISHED ⓘ Saumur NERFINISHED ⓘ western France NERFINISHED ⓘ |
| material | rock and masonry ⓘ |
| notableEvent | RAF precision bombing raid with Tallboy bombs ⓘ |
| operator | French railway authorities ⓘ |
| partOf | French railway network ⓘ |
| purposeDuringWWII | German military rail supply route ⓘ |
| regionServed | Loire Valley NERFINISHED ⓘ |
| strategicImportance | key rail link in western France ⓘ |
| usedFor | 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: Saumur railway tunnel Description of subject: The Saumur railway tunnel is a strategic rail tunnel in western France that became historically notable when it was successfully attacked by RAF Tallboy bombs during World War II.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.