Flat Holm
E116306
Flat Holm is a small limestone island in the Bristol Channel known for its rich wildlife, historic fortifications, and role in early wireless radio experiments.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Flat Holm canonical | 12 |
| Flat Holm Project | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T961883 — 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 Context triple: [Bristol Channel, hasIsland, Flat Holm]
-
A.
Steep Holm
Steep Holm is a small, steep-sided limestone island in the Bristol Channel known for its rich wildlife, historical fortifications, and dramatic coastal cliffs.
-
B.
Isle of Sheppey
The Isle of Sheppey is a low-lying island off the northern coast of Kent in southeast England, known for its marshland landscapes, coastal wildlife habitats, and historic naval and aviation sites.
-
C.
Walney Island
Walney Island is a long, narrow island off the coast of Barrow-in-Furness in Cumbria, England, known for its nature reserves, coastal landscapes, and role as a protective barrier for the Furness Peninsula.
-
D.
The Needles
The Needles are a distinctive row of chalk stacks rising dramatically from the sea off the western tip of the Isle of Wight, famous as one of England’s most iconic coastal landmarks.
-
E.
Bass Rock
Bass Rock is a small, steep-sided island off the east coast of Scotland, famed for its massive gannet colony and striking volcanic geology.
- 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 Target entity description: Flat Holm is a small limestone island in the Bristol Channel known for its rich wildlife, historic fortifications, and role in early wireless radio experiments.
-
A.
Steep Holm
Steep Holm is a small, steep-sided limestone island in the Bristol Channel known for its rich wildlife, historical fortifications, and dramatic coastal cliffs.
-
B.
Isle of Sheppey
The Isle of Sheppey is a low-lying island off the northern coast of Kent in southeast England, known for its marshland landscapes, coastal wildlife habitats, and historic naval and aviation sites.
-
C.
Walney Island
Walney Island is a long, narrow island off the coast of Barrow-in-Furness in Cumbria, England, known for its nature reserves, coastal landscapes, and role as a protective barrier for the Furness Peninsula.
-
D.
The Needles
The Needles are a distinctive row of chalk stacks rising dramatically from the sea off the western tip of the Isle of Wight, famous as one of England’s most iconic coastal landmarks.
-
E.
Bass Rock
Bass Rock is a small, steep-sided island off the east coast of Scotland, famed for its massive gannet colony and striking volcanic geology.
- F. None of above. chosen
Statements (56)
| Predicate | Object |
|---|---|
| instanceOf |
island
ⓘ
lighthouse ⓘ limestone island ⓘ |
| accessMethod | boat ⓘ |
| area |
0.35 square kilometres
ⓘ
35 hectares ⓘ |
| automatedIn | 1988 ⓘ |
| constructedIn | 1737 ⓘ |
| coordinateLocation | 51.38°N 3.12°W ⓘ |
| country | United Kingdom ⓘ |
| distanceToCardiff | about 8 kilometres ⓘ |
| distanceToWestonSuperMare | about 10 kilometres ⓘ |
| elevation | 32 metres ⓘ |
| fauna |
herring gull
ⓘ
large gull colonies ⓘ lesser black-backed gull ⓘ |
| firstWirelessMessageLanguage | Morse code ⓘ |
| flora |
sea campion
ⓘ
thrift ⓘ wild leek ⓘ |
| geologicalComposition | limestone ⓘ |
| governingBody | Cardiff Council ⓘ |
| habitat |
cliff habitat
ⓘ
maritime grassland ⓘ |
| hasAccommodation | basic visitor accommodation ⓘ |
| hasDesignation | Scheduled Ancient Monument ⓘ |
| hasPowerSource |
diesel generators
ⓘ
renewable energy systems ⓘ |
| hasStructure |
Victorian gun battery
ⓘ
World War II gun emplacements ⓘ barracks ⓘ lighthouse ⓘ |
| hasVisitorAccess | yes ⓘ |
| highestPoint | 32 metres above sea level ⓘ |
| historicPeriodOfFortification |
Victorian era
ⓘ
World War II ⓘ |
| historicUse |
military fortification
ⓘ
quarantine station ⓘ smuggling base ⓘ |
| knownFor |
early wireless radio experiments
ⓘ
historic fortifications ⓘ rich wildlife ⓘ |
| lighthouseName | Flat Holm Lighthouse ⓘ |
| locatedIn |
Bristol Channel
ⓘ
Cardiff ⓘ Wales ⓘ |
| locatedOn | Flat Holm ⓘ |
| managedBy |
Flat Holm Project
ⓘ
linked to:
Flat Holm
|
| nearbyIsland | Steep Holm ⓘ |
| protectedStatus |
Local Nature Reserve
ⓘ
Site of Special Scientific Interest ⓘ |
| radioExperimentBy | Guglielmo Marconi ⓘ |
| radioExperimentDate | 13 May 1897 ⓘ |
| radioExperimentTo |
Lavernock Point
ⓘ
linked to:
Penarth Head
|
| radioExperimentType | wireless telegraphy ⓘ |
| separatedFrom | Steep Holm ⓘ |
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 Description of subject: Flat Holm is a small limestone island in the Bristol Channel known for its rich wildlife, historic fortifications, and role in early wireless radio experiments.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.