Pentre Ifan
E525648
Pentre Ifan is a well-preserved Neolithic dolmen in Pembrokeshire, Wales, renowned for its striking capstone and status as one of the most iconic megalithic monuments in Britain.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Pentre Ifan canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5413952 — 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: Pentre Ifan Context triple: [Preseli Hills, hasArchaeologicalSite, Pentre Ifan]
-
A.
Ton Pentre
Ton Pentre is a village in the Rhondda Cynon Taf county borough of South Wales, historically known for its coal mining community within the Rhondda Valley.
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B.
Kidwelly
Kidwelly is a historic town in southwest Wales, best known for its well-preserved medieval castle overlooking the River Gwendraeth.
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C.
Tal-y-Cafn
Tal-y-Cafn is a small village in Conwy County Borough, Wales, situated in the Conwy Valley and known for its rural setting and former railway station on the Conwy Valley Line.
-
D.
Bargoed
Bargoed is a former coal mining town in the Rhymney Valley of south Wales that developed rapidly during the industrial era.
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E.
Pwllmeyric
Pwllmeyric is a small village and suburb on the outskirts of Chepstow in Monmouthshire, Wales.
- 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: Pentre Ifan Target entity description: Pentre Ifan is a well-preserved Neolithic dolmen in Pembrokeshire, Wales, renowned for its striking capstone and status as one of the most iconic megalithic monuments in Britain.
-
A.
Ton Pentre
Ton Pentre is a village in the Rhondda Cynon Taf county borough of South Wales, historically known for its coal mining community within the Rhondda Valley.
-
B.
Kidwelly
Kidwelly is a historic town in southwest Wales, best known for its well-preserved medieval castle overlooking the River Gwendraeth.
-
C.
Tal-y-Cafn
Tal-y-Cafn is a small village in Conwy County Borough, Wales, situated in the Conwy Valley and known for its rural setting and former railway station on the Conwy Valley Line.
-
D.
Bargoed
Bargoed is a former coal mining town in the Rhymney Valley of south Wales that developed rapidly during the industrial era.
-
E.
Pwllmeyric
Pwllmeyric is a small village and suburb on the outskirts of Chepstow in Monmouthshire, Wales.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Neolithic dolmen
ⓘ
megalithic monument ⓘ scheduled monument ⓘ |
| access | footpath from nearby road ⓘ |
| associatedWith |
Neolithic funerary practices
ⓘ
prehistoric ritual activity ⓘ |
| category |
Archaeological sites in Pembrokeshire
ⓘ
Dolmens in Wales ⓘ Neolithic sites in Wales ⓘ |
| constructedInPeriod | Neolithic ⓘ |
| country |
United Kingdom
ⓘ
Wales ⓘ |
| culturalPeriod | Neolithic Britain NERFINISHED ⓘ |
| currentCondition |
cairn largely removed
ⓘ
chamber stones standing ⓘ |
| entranceFee | free ⓘ |
| estimatedConstructionDate | around 3500 BCE ⓘ |
| excavatedBy | William Francis Grimes NERFINISHED ⓘ |
| excavationDate |
1936
ⓘ
1958 ⓘ |
| featuredIn | guides to British prehistoric sites ⓘ |
| function |
burial chamber
ⓘ
communal tomb ⓘ |
| hasCapstoneLength | about 5 metres ⓘ |
| hasCapstoneWeight | about 16 tonnes ⓘ |
| hasLandscapeContext |
overlooks the Nevern Valley
ⓘ
set in farmland and moorland ⓘ |
| hasOriginalForm | covered by an earthen or stone cairn ⓘ |
| hasPart |
capstone
ⓘ
chamber ⓘ portal stones ⓘ upright stones ⓘ |
| hasSignage | interpretive information panels ⓘ |
| heritageDesignation | Scheduled Ancient Monument NERFINISHED ⓘ |
| location | Pembrokeshire NERFINISHED ⓘ |
| managedBy | Cadw NERFINISHED ⓘ |
| material |
igneous rock
ⓘ
local stone ⓘ |
| nearestTown | Newport, Pembrokeshire NERFINISHED ⓘ |
| notableFor |
iconic silhouette
ⓘ
one of the best-known dolmens in Britain ⓘ striking capstone ⓘ well-preserved state ⓘ |
| openToPublic | yes ⓘ |
| orientation | roughly northeast–southwest ⓘ |
| ownership | public ⓘ |
| region | southwest Wales NERFINISHED ⓘ |
| touristAttraction | yes ⓘ |
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: Pentre Ifan Description of subject: Pentre Ifan is a well-preserved Neolithic dolmen in Pembrokeshire, Wales, renowned for its striking capstone and status as one of the most iconic megalithic monuments in Britain.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.