Preveza–Aktion underwater tunnel
E432517
The Preveza–Aktion underwater tunnel is a submerged road tunnel in western Greece that provides a direct vehicular link beneath the Ambracian Gulf between the town of Preveza and the Aktion area.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Preveza–Aktion underwater tunnel canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4364441 — 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: Preveza–Aktion underwater tunnel Context triple: [Preveza, connectedBy, Preveza–Aktion underwater tunnel]
-
A.
Finnfast subsea tunnel
The Finnfast subsea tunnel is an undersea road tunnel system in Rogaland, Norway, that connects the island of Finnøy and surrounding islands to the mainland.
-
B.
Eurasia Tunnel
The Eurasia Tunnel is an underwater road tunnel in Istanbul that connects the European and Asian sides of the city, easing transcontinental traffic beneath the Bosporus Strait.
-
C.
Elbe Tunnel (Hamburg)
The Elbe Tunnel in Hamburg is a major underwater road tunnel beneath the River Elbe that forms a key traffic artery connecting the northern and southern parts of the city.
-
D.
Piet Hein Tunnel
The Piet Hein Tunnel is a major road and tram tunnel in Amsterdam that connects the city center with the Eastern Docklands and the A10 ring road.
-
E.
Velsertunnel
The Velsertunnel is a major road and rail tunnel in the Netherlands that runs beneath the North Sea Canal near Velsen, providing a key connection between the regions north and south of the canal.
- 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: Preveza–Aktion underwater tunnel Target entity description: The Preveza–Aktion underwater tunnel is a submerged road tunnel in western Greece that provides a direct vehicular link beneath the Ambracian Gulf between the town of Preveza and the Aktion area.
-
A.
Finnfast subsea tunnel
The Finnfast subsea tunnel is an undersea road tunnel system in Rogaland, Norway, that connects the island of Finnøy and surrounding islands to the mainland.
-
B.
Eurasia Tunnel
The Eurasia Tunnel is an underwater road tunnel in Istanbul that connects the European and Asian sides of the city, easing transcontinental traffic beneath the Bosporus Strait.
-
C.
Elbe Tunnel (Hamburg)
The Elbe Tunnel in Hamburg is a major underwater road tunnel beneath the River Elbe that forms a key traffic artery connecting the northern and southern parts of the city.
-
D.
Piet Hein Tunnel
The Piet Hein Tunnel is a major road and tram tunnel in Amsterdam that connects the city center with the Eastern Docklands and the A10 ring road.
-
E.
Velsertunnel
The Velsertunnel is a major road and rail tunnel in the Netherlands that runs beneath the North Sea Canal near Velsen, providing a key connection between the regions north and south of the canal.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
road tunnel
ⓘ
submerged tunnel ⓘ undersea road tunnel ⓘ |
| accessRestrictedTo | motor vehicles ⓘ |
| connects |
Aetolia-Acarnania region
ⓘ
linked to:
Aetolia-Acarnania
Aktion ⓘ Epirus region ⓘ
linked to:
Epirus
Preveza ⓘ |
| constructionMethod | immersed tube tunnel ⓘ |
| country | Greece ⓘ |
| crosses | Ambracian Gulf ⓘ |
| hasLanes | 2 ⓘ |
| hasStructureType | tunnel tube ⓘ |
| hasToll | yes ⓘ |
| isBelow | sea level ⓘ |
| languageOfName | Greek ⓘ |
| locatedIn | western Greece ⓘ |
| locatedNear |
Aktion National Airport
ⓘ
Ionian Sea ⓘ |
| namedAfter |
Aktion
ⓘ
Preveza ⓘ |
| operator | state concessionaire ⓘ |
| partOf | Greek road network ⓘ |
| purpose |
provide all-weather crossing of Ambracian Gulf
ⓘ
reduce travel time between Epirus and western Greece ⓘ |
| regionServed |
Aetolia-Acarnania regional unit
ⓘ
linked to:
Aetolia-Acarnania
Preveza regional unit ⓘ |
| replaced | ferry connection between Preveza and Aktion ⓘ |
| roadType | vehicular traffic ⓘ |
| usedFor | road 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: Preveza–Aktion underwater tunnel Description of subject: The Preveza–Aktion underwater tunnel is a submerged road tunnel in western Greece that provides a direct vehicular link beneath the Ambracian Gulf between the town of Preveza and the Aktion area.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.