Flat Holm Lighthouse
E505851
Flat Holm Lighthouse is a historic navigational beacon located on the island of Flat Holm in the Bristol Channel, guiding maritime traffic near the coast of Wales.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Flat Holm Lighthouse canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5155869 — 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: Flat Holm Lighthouse Context triple: [Flat Holm, lighthouseName, Flat Holm Lighthouse]
-
A.
Calshot Lighthouse
Calshot Lighthouse is a historic navigational beacon located on Calshot Spit at the entrance to Southampton Water on the south coast of England.
-
B.
The Needles Lighthouse
The Needles Lighthouse is a prominent 19th-century lighthouse standing on a chalk stack off the western tip of the Isle of Wight, guiding ships through the treacherous waters of the English Channel.
-
C.
Perch Rock Lighthouse
Perch Rock Lighthouse is a historic 19th-century lighthouse off New Brighton at the mouth of the River Mersey in England, known for guiding ships entering the Port of Liverpool.
-
D.
Hunstanton Lighthouse
Hunstanton Lighthouse is a historic coastal beacon in Hunstanton, Norfolk, England, overlooking The Wash and guiding ships along the east coast.
-
E.
Berry Head Lighthouse
Berry Head Lighthouse is a historic coastal beacon on the Berry Head headland near Brixham in Devon, England, guiding ships navigating the entrance to Tor Bay.
- 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: Flat Holm Lighthouse Target entity description: Flat Holm Lighthouse is a historic navigational beacon located on the island of Flat Holm in the Bristol Channel, guiding maritime traffic near the coast of Wales.
-
A.
Calshot Lighthouse
Calshot Lighthouse is a historic navigational beacon located on Calshot Spit at the entrance to Southampton Water on the south coast of England.
-
B.
The Needles Lighthouse
The Needles Lighthouse is a prominent 19th-century lighthouse standing on a chalk stack off the western tip of the Isle of Wight, guiding ships through the treacherous waters of the English Channel.
-
C.
Perch Rock Lighthouse
Perch Rock Lighthouse is a historic 19th-century lighthouse off New Brighton at the mouth of the River Mersey in England, known for guiding ships entering the Port of Liverpool.
-
D.
Hunstanton Lighthouse
Hunstanton Lighthouse is a historic coastal beacon in Hunstanton, Norfolk, England, overlooking The Wash and guiding ships along the east coast.
-
E.
Berry Head Lighthouse
Berry Head Lighthouse is a historic coastal beacon on the Berry Head headland near Brixham in Devon, England, guiding ships navigating the entrance to Tor Bay.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
lighthouse
ⓘ
navigational aid ⓘ |
| access | by boat only ⓘ |
| associatedIsland | Flat Holm NERFINISHED ⓘ |
| automated | yes ⓘ |
| automationYear | 1988 ⓘ |
| builtFor | Trinity House NERFINISHED ⓘ |
| category | coastal lighthouse ⓘ |
| constructionMaterial | stone ⓘ |
| coordinates | 51.379°N 3.123°W ⓘ |
| country |
United Kingdom
ⓘ
Wales ⓘ |
| countryAdmin | Wales NERFINISHED ⓘ |
| focalHeight | 50 metres ⓘ |
| fogSignal | present ⓘ |
| function | warning of rocks and shoals around Flat Holm ⓘ |
| hasBalcony | yes ⓘ |
| hasKeeperDwelling | yes ⓘ |
| hasLantern | yes ⓘ |
| heritageStatus | listed building ⓘ |
| isOnIsland | Flat Holm NERFINISHED ⓘ |
| laterLighting |
electric light
ⓘ
oil lamp ⓘ |
| lightCharacteristic | Fl W 10s ⓘ |
| locatedInWaterBody | Bristol Channel NERFINISHED ⓘ |
| locatedNear | Severn Estuary NERFINISHED ⓘ |
| locatedOffCoastOf |
Cardiff
NERFINISHED
ⓘ
South Wales NERFINISHED ⓘ |
| location | Flat Holm NERFINISHED ⓘ |
| managingAgent | Trinity House NERFINISHED ⓘ |
| marking | white tower ⓘ |
| nearbyLandmark | Steep Holm NERFINISHED ⓘ |
| notableFor | being one of the earliest lighthouses in the Bristol Channel ⓘ |
| operator | Trinity House NERFINISHED ⓘ |
| originalLighting | coal fire ⓘ |
| partOf | navigational system of the Bristol Channel ⓘ |
| powerSource | mains electricity ⓘ |
| purpose | to guide maritime traffic in the Bristol Channel ⓘ |
| range | 16 nautical miles ⓘ |
| region | Vale of Glamorgan NERFINISHED ⓘ |
| servesPort |
Bristol
NERFINISHED
ⓘ
Cardiff NERFINISHED ⓘ |
| status | active ⓘ |
| surroundedBy | Bristol Channel waters ⓘ |
| towerHeight | 30 metres ⓘ |
| towerShape | cylindrical tower with balcony and lantern ⓘ |
| yearLit | 1737 ⓘ |
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: Flat Holm Lighthouse Description of subject: Flat Holm Lighthouse is a historic navigational beacon located on the island of Flat Holm in the Bristol Channel, guiding maritime traffic near the coast of Wales.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.