Triple

T9664790
Position Surface form Disambiguated ID Type / Status
Subject Cambrian Coast Line E233675 entity
Predicate terminus P388 FINISHED
Object Pwllheli railway station
Pwllheli railway station is a coastal railway terminus in Gwynedd, Wales, serving the town of Pwllheli at the western end of the Cambrian Coast Line.
 E814590 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: Pwllheli railway station | Statement: [Cambrian Coast Line, terminus, Pwllheli railway station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Pwllheli railway station
Context triple: [Cambrian Coast Line, terminus, Pwllheli railway station]
  • A. Tywyn Wharf railway station
    Tywyn Wharf railway station is the main station and visitor hub of the historic narrow-gauge Talyllyn Railway in Gwynedd, Wales.
  • 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. Tywyn railway station
    Tywyn railway station is a small coastal railway stop in Gwynedd, Wales, serving the town of Tywyn on the Cambrian Line.
  • D. Narberth railway station
    Narberth railway station is a small rural stop on the West Wales Line in Pembrokeshire, Wales, serving the town of Narberth with regional rail services.
  • E. Rhyl railway station
    Rhyl railway station is a coastal rail station in Denbighshire, Wales, serving the seaside town of Rhyl with regional and long-distance services.
  • 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: Pwllheli railway station
Triple: [Cambrian Coast Line, terminus, Pwllheli railway station]
Generated description
Pwllheli railway station is a coastal railway terminus in Gwynedd, Wales, serving the town of Pwllheli at the western end of the Cambrian Coast Line.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Pwllheli railway station
Target entity description: Pwllheli railway station is a coastal railway terminus in Gwynedd, Wales, serving the town of Pwllheli at the western end of the Cambrian Coast Line.
  • A. Tywyn Wharf railway station
    Tywyn Wharf railway station is the main station and visitor hub of the historic narrow-gauge Talyllyn Railway in Gwynedd, Wales.
  • 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. Tywyn railway station
    Tywyn railway station is a small coastal railway stop in Gwynedd, Wales, serving the town of Tywyn on the Cambrian Line.
  • D. Narberth railway station
    Narberth railway station is a small rural stop on the West Wales Line in Pembrokeshire, Wales, serving the town of Narberth with regional rail services.
  • E. Rhyl railway station
    Rhyl railway station is a coastal rail station in Denbighshire, Wales, serving the seaside town of Rhyl with regional and long-distance services.
  • 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_69ca848d3b6c8190ae98ea554dea58df completed March 30, 2026, 2:11 p.m.
NER Named-entity recognition batch_69cd9c0e1ef481909c50a4ba5fd94583 completed April 1, 2026, 10:28 p.m.
NED1 Entity disambiguation (via context triple) batch_69d190f691c8819093fe133bdbe1c9d1 completed April 4, 2026, 10:30 p.m.
NEDg Description generation batch_69d1919b536481908fe80426c9aa6443 completed April 4, 2026, 10:32 p.m.
NED2 Entity disambiguation (via description) batch_69d191ca17b8819097750a7b638aee72 completed April 4, 2026, 10:33 p.m.
Created at: March 30, 2026, 8:14 p.m.