South Stack Lighthouse
E222611
South Stack Lighthouse is a historic 19th-century beacon perched on a small islet off the coast of Anglesey in Wales, renowned for guiding ships through the treacherous waters of the Irish Sea.
All labels observed (1)
| Label | Occurrences |
|---|---|
| South Stack Lighthouse canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T1975261 — 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: South Stack Lighthouse Context triple: [Anglesey, hasHistoricSite, South Stack Lighthouse]
-
A.
Elie Lighthouse
Elie Lighthouse is a coastal navigational beacon near the village of Elie in Fife, Scotland, guiding ships along the Firth of Forth.
-
B.
Tahkuna Lighthouse
Tahkuna Lighthouse is a historic cast-iron lighthouse located on the northern tip of Hiiumaa Island in Estonia, known for being one of the tallest lighthouses in the country.
-
C.
Isle of May Lighthouse
The Isle of May Lighthouse is a historic Scottish lighthouse on the Isle of May in the Firth of Forth, known for guiding maritime traffic and its association with early lighthouse engineering.
-
D.
Cape Poge Lighthouse
Cape Poge Lighthouse is a historic coastal beacon on Chappaquiddick Island in Massachusetts, known for guiding ships through the waters off Martha’s Vineyard.
-
E.
West Chop Lighthouse
West Chop Lighthouse is a historic navigational beacon located on the West Chop headland in Vineyard Haven, Martha’s Vineyard, Massachusetts.
- 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: South Stack Lighthouse Target entity description: South Stack Lighthouse is a historic 19th-century beacon perched on a small islet off the coast of Anglesey in Wales, renowned for guiding ships through the treacherous waters of the Irish Sea.
-
A.
Elie Lighthouse
Elie Lighthouse is a coastal navigational beacon near the village of Elie in Fife, Scotland, guiding ships along the Firth of Forth.
-
B.
Tahkuna Lighthouse
Tahkuna Lighthouse is a historic cast-iron lighthouse located on the northern tip of Hiiumaa Island in Estonia, known for being one of the tallest lighthouses in the country.
-
C.
Isle of May Lighthouse
The Isle of May Lighthouse is a historic Scottish lighthouse on the Isle of May in the Firth of Forth, known for guiding maritime traffic and its association with early lighthouse engineering.
-
D.
Cape Poge Lighthouse
Cape Poge Lighthouse is a historic coastal beacon on Chappaquiddick Island in Massachusetts, known for guiding ships through the waters off Martha’s Vineyard.
-
E.
West Chop Lighthouse
West Chop Lighthouse is a historic navigational beacon located on the West Chop headland in Vineyard Haven, Martha’s Vineyard, Massachusetts.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
building
ⓘ
lighthouse ⓘ maritime navigational aid ⓘ |
| access | via bridge from mainland cliffs ⓘ |
| administeredBy | Trinity House ⓘ |
| architect |
Daniel Asher Alexander
ⓘ
surface form:
Daniel Alexander
|
| automated | 1984 ⓘ |
| category | Lighthouses in Wales ⓘ |
| constructionMaterial | masonry ⓘ |
| constructionStartDate | 1808 ⓘ |
| country | United Kingdom ⓘ |
| focalHeight |
197 feet
ⓘ
60 metres ⓘ |
| hasFogSignal | true ⓘ |
| height |
28 metres
ⓘ
92 feet ⓘ |
| heritageDesignationDate | 20 July 1971 ⓘ |
| heritageStatus | Grade II listed building ⓘ |
| inception | 1809 ⓘ |
| lightCharacteristic |
Fl W 10s
ⓘ
white flash every 10 seconds ⓘ |
| locatedIn |
Anglesey
ⓘ
Irish Sea ⓘ Wales ⓘ |
| locatedNear |
Holy Island
ⓘ
Holyhead ⓘ |
| locatedOffCoastOf |
Anglesey
ⓘ
Wales ⓘ |
| locatedOn | South Stack ⓘ |
| managedBy | Trinity House ⓘ |
| marking |
white lantern
ⓘ
white tower ⓘ |
| nearbyFeature |
RSPB South Stack reserve
ⓘ
surface form:
RSPB South Stack nature reserve
South Stack Cliffs ⓘ |
| notableFor |
dramatic cliff-top setting
ⓘ
guiding ships through treacherous waters of the Irish Sea ⓘ |
| numberOfStepsInAccessStairway | 400 ⓘ |
| ownedBy | Trinity House ⓘ |
| powerSource | electricity ⓘ |
| previousLensType | Fresnel lens ⓘ |
| previousPowerSource | oil lamp ⓘ |
| purpose |
to guide ships through the Irish Sea
ⓘ
to warn vessels of rocks off Anglesey ⓘ |
| range | 24 nautical miles ⓘ |
| seaArea | Irish Sea ⓘ |
| shape | cylindrical tower with balcony and lantern ⓘ |
| touristAttraction | true ⓘ |
| yearLit | 1809 ⓘ |
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: South Stack Lighthouse Description of subject: South Stack Lighthouse is a historic 19th-century beacon perched on a small islet off the coast of Anglesey in Wales, renowned for guiding ships through the treacherous waters of the Irish Sea.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.