Triple

T9262258
Position Surface form Disambiguated ID Type / Status
Subject Llangefni E222606 entity
Predicate hasFormerRailwayLine P20480 FINISHED
Object Anglesey Central Railway
Anglesey Central Railway was a former railway line on the island of Anglesey in Wales that connected several inland towns and facilitated local transport and industry.
E788227 NE FINISHED

How this triple was built (5 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: Anglesey Central Railway | Statement: [Llangefni, hasFormerRailwayLine, Anglesey Central Railway]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Anglesey Central Railway
Context triple: [Llangefni, hasFormerRailwayLine, Anglesey Central Railway]
  • A. Conwy Valley Line
    The Conwy Valley Line is a scenic railway route in North Wales that runs through the Conwy Valley from the coast into the Snowdonia National Park.
  • B. Maesteg Line
    The Maesteg Line is a commuter rail route in South Wales connecting Maesteg with larger hubs such as Cardiff via Bridgend.
  • C. Talyllyn Railway
    Talyllyn Railway is a historic narrow-gauge heritage railway in Wales, renowned as the world’s first preserved railway to be operated primarily by volunteers.
  • D. Llangollen Railway
    Llangollen Railway is a preserved heritage railway in Denbighshire, Wales, known for operating steam and heritage diesel services through the scenic Dee Valley.
  • E. Cynwyd Line
    The Cynwyd Line is a short commuter rail service in the Philadelphia area operated by SEPTA, running between Center City and the Cynwyd neighborhood in Lower Merion Township.
  • 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: Anglesey Central Railway
Triple: [Llangefni, hasFormerRailwayLine, Anglesey Central Railway]
Generated description
Anglesey Central Railway was a former railway line on the island of Anglesey in Wales that connected several inland towns and facilitated local transport and industry.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Anglesey Central Railway
Target entity description: Anglesey Central Railway was a former railway line on the island of Anglesey in Wales that connected several inland towns and facilitated local transport and industry.
  • A. Conwy Valley Line
    The Conwy Valley Line is a scenic railway route in North Wales that runs through the Conwy Valley from the coast into the Snowdonia National Park.
  • B. Maesteg Line
    The Maesteg Line is a commuter rail route in South Wales connecting Maesteg with larger hubs such as Cardiff via Bridgend.
  • C. Talyllyn Railway
    Talyllyn Railway is a historic narrow-gauge heritage railway in Wales, renowned as the world’s first preserved railway to be operated primarily by volunteers.
  • D. Llangollen Railway
    Llangollen Railway is a preserved heritage railway in Denbighshire, Wales, known for operating steam and heritage diesel services through the scenic Dee Valley.
  • E. Cynwyd Line
    The Cynwyd Line is a short commuter rail service in the Philadelphia area operated by SEPTA, running between Center City and the Cynwyd neighborhood in Lower Merion Township.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: hasFormerRailwayLine
Context triple: [Llangefni, hasFormerRailwayLine, Anglesey Central Railway]
  • A. formerRailwayLine chosen
    Indicates that a railway line previously existed in the past but is no longer in operation or has been decommissioned.
  • B. followsFormerRailroad
    Indicates that something is aligned with or traces the route of a former railroad line.
  • C. railroadLinePredecessor
    Indicates that one railroad line is the direct predecessor or earlier version in the historical or organizational sequence of another railroad line.
  • D. hasRailroadHistoryWith
    Indicates a historical relationship or connection between entities involving railroads, such as shared development, operation, or significant events in railway history.
  • E. formerRailUse
    Indicates that an entity previously served a particular railway-related function or purpose, but no longer does so.
  • F. None of above.

Provenance (6 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_69ca841f2e808190a64f4c31903a1332 completed March 30, 2026, 2:09 p.m.
NER Named-entity recognition batch_69cd07189bc48190987315bd5d3ce4f1 completed April 1, 2026, 11:52 a.m.
NED1 Entity disambiguation (via context triple) batch_69d09c0526c48190aae93a70cfe5562c completed April 4, 2026, 5:05 a.m.
NEDg Description generation batch_69d09d6cc45c8190b6cb44212ccfcbc8 completed April 4, 2026, 5:11 a.m.
NED2 Entity disambiguation (via description) batch_69d09e2069048190ac22b738fa324771 completed April 4, 2026, 5:14 a.m.
PD Predicate disambiguation batch_69cc7a537bbc8190baee71f556e52a7b completed April 1, 2026, 1:52 a.m.
Created at: March 30, 2026, 7:32 p.m.