Triple
T2219241
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Talyllyn Railway |
E48102
|
entity |
| Predicate | terminus |
P388
|
FINISHED |
| Object |
Nant Gwernol railway station
Nant Gwernol railway station is the upper mountain terminus of the historic narrow-gauge Talyllyn Railway in Mid Wales, serving as a scenic endpoint for heritage steam train services.
|
E252072
|
NE FINISHED |
How this triple was built (4 steps)
Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.
NER
Named-entity recognition
gpt-5-mini
Instruction
Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).
Input
Phrase: Nant Gwernol railway station | Statement: [Talyllyn Railway, terminus, Nant Gwernol railway station]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Nant Gwernol railway station Context triple: [Talyllyn Railway, terminus, Nant Gwernol railway station]
-
A.
Blaenau Ffestiniog Station
Blaenau Ffestiniog Station is a railway station in the town of Blaenau Ffestiniog in Gwynedd, Wales, serving as a key terminus for heritage and mainline rail services in the area.
-
B.
Barmouth railway station
Barmouth railway station is a coastal train station in Gwynedd, Wales, providing passenger rail services to the seaside town of Barmouth on the Cambrian Coast Line.
-
C.
Cynwyd station
Cynwyd station is a SEPTA regional rail station in Bala Cynwyd, Pennsylvania, serving as the northern endpoint of the short Cynwyd Line into Philadelphia.
-
D.
Cwmbran railway station
Cwmbran railway station is a local rail stop in Cwmbran, Wales, providing regional passenger services and connections to the wider rail network.
-
E.
Merthyr Tydfil railway station
Merthyr Tydfil railway station is the main train station serving the town of Merthyr Tydfil in Wales, providing regional rail connections to surrounding areas.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg
Description generation
gpt-5.1
Instruction
Generate a one-sentence description of the target entity. You are given a context triple in the form (subject, predicate, object), where the object is the target entity. # Instructions Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. Avoid repeating the information from the triple, unless really essential. # Response Format Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Nant Gwernol railway station Triple: [Talyllyn Railway, terminus, Nant Gwernol railway station]
Generated description
Nant Gwernol railway station is the upper mountain terminus of the historic narrow-gauge Talyllyn Railway in Mid Wales, serving as a scenic endpoint for heritage steam train services.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Nant Gwernol railway station Target entity description: Nant Gwernol railway station is the upper mountain terminus of the historic narrow-gauge Talyllyn Railway in Mid Wales, serving as a scenic endpoint for heritage steam train services.
-
A.
Blaenau Ffestiniog Station
Blaenau Ffestiniog Station is a railway station in the town of Blaenau Ffestiniog in Gwynedd, Wales, serving as a key terminus for heritage and mainline rail services in the area.
-
B.
Barmouth railway station
Barmouth railway station is a coastal train station in Gwynedd, Wales, providing passenger rail services to the seaside town of Barmouth on the Cambrian Coast Line.
-
C.
Cynwyd station
Cynwyd station is a SEPTA regional rail station in Bala Cynwyd, Pennsylvania, serving as the northern endpoint of the short Cynwyd Line into Philadelphia.
-
D.
Cwmbran railway station
Cwmbran railway station is a local rail stop in Cwmbran, Wales, providing regional passenger services and connections to the wider rail network.
-
E.
Merthyr Tydfil railway station
Merthyr Tydfil railway station is the main train station serving the town of Merthyr Tydfil in Wales, providing regional rail connections to surrounding areas.
- F. None of above. chosen
Provenance (5 batches)
The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.
| Step | Stage | Batch ID | Status | When |
|---|---|---|---|---|
| creating | Elicitation | batch_69a88aa1ee708190862c8c378c41e9eb |
completed | March 4, 2026, 7:40 p.m. |
| NER | Named-entity recognition | batch_69abc011d50c8190b1c375cc633f8189 |
completed | March 7, 2026, 6:05 a.m. |
| NED1 | Entity disambiguation (via context triple) | batch_69ae7efdb7a08190b74e841279b59971 |
completed | March 9, 2026, 8:04 a.m. |
| NEDg | Description generation | batch_69ae7f90d3a88190bf61c6f063b67c06 |
completed | March 9, 2026, 8:06 a.m. |
| NED2 | Entity disambiguation (via description) | batch_69ae800868948190a5504969c4cabb7d |
completed | March 9, 2026, 8:08 a.m. |
Created at: March 4, 2026, 7:46 p.m.