Triple

T8881517
Position Surface form Disambiguated ID Type / Status
Subject LNER Class P2 E211420 entity
Predicate heritageProjectOperator P56395 FINISHED
Object A1 Steam Locomotive Trust
The A1 Steam Locomotive Trust is a British charitable organization dedicated to designing, building, and operating new mainline steam locomotives to historic LNER designs.
E764185 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: A1 Steam Locomotive Trust | Statement: [LNER Class P2, heritageProjectOperator, A1 Steam Locomotive Trust]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: A1 Steam Locomotive Trust
Context triple: [LNER Class P2, heritageProjectOperator, A1 Steam Locomotive Trust]
  • A. Bluebell Railway
    Bluebell Railway is a renowned preserved heritage railway in Sussex, England, operating historic steam trains through scenic countryside and serving as a popular tourist attraction and film location.
  • B. Dartmouth Steam Railway
    Dartmouth Steam Railway is a heritage steam-operated tourist railway in Devon, England, running along the scenic coast and River Dart between Paignton and Kingswear.
  • C. Cambrian Heritage Railways
    Cambrian Heritage Railways is a preserved heritage railway in Shropshire, England, dedicated to restoring and operating former Cambrian Railways lines and rolling stock for historical and tourist purposes.
  • D. Cambrian Railways
    Cambrian Railways was a historic railway company in Wales that operated an extensive network of rural lines across mid- and west Wales before becoming part of the Great Western Railway in the early 20th century.
  • E. Taff Vale Railway
    Taff Vale Railway was a historic Welsh railway company that played a key role in transporting coal and passengers in South Wales during the 19th and early 20th centuries.
  • 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: A1 Steam Locomotive Trust
Triple: [LNER Class P2, heritageProjectOperator, A1 Steam Locomotive Trust]
Generated description
The A1 Steam Locomotive Trust is a British charitable organization dedicated to designing, building, and operating new mainline steam locomotives to historic LNER designs.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: A1 Steam Locomotive Trust
Target entity description: The A1 Steam Locomotive Trust is a British charitable organization dedicated to designing, building, and operating new mainline steam locomotives to historic LNER designs.
  • A. Bluebell Railway
    Bluebell Railway is a renowned preserved heritage railway in Sussex, England, operating historic steam trains through scenic countryside and serving as a popular tourist attraction and film location.
  • B. Dartmouth Steam Railway
    Dartmouth Steam Railway is a heritage steam-operated tourist railway in Devon, England, running along the scenic coast and River Dart between Paignton and Kingswear.
  • C. Cambrian Heritage Railways
    Cambrian Heritage Railways is a preserved heritage railway in Shropshire, England, dedicated to restoring and operating former Cambrian Railways lines and rolling stock for historical and tourist purposes.
  • D. Cambrian Railways
    Cambrian Railways was a historic railway company in Wales that operated an extensive network of rural lines across mid- and west Wales before becoming part of the Great Western Railway in the early 20th century.
  • E. Taff Vale Railway
    Taff Vale Railway was a historic Welsh railway company that played a key role in transporting coal and passengers in South Wales during the 19th and early 20th centuries.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: heritageProjectOperator
Context triple: [LNER Class P2, heritageProjectOperator, A1 Steam Locomotive Trust]
  • A. heritageOperator chosen
    Indicates that an entity operates, manages, or runs a heritage-related site, service, or asset.
  • B. isHeritageOperation
    Indicates that an operation is designated as a heritage-related activity, typically involving the preservation, restoration, or maintenance of culturally or historically significant assets or practices.
  • C. heritageService
    Indicates that an entity provides, manages, or is associated with services related to the preservation, interpretation, or promotion of cultural or natural heritage.
  • D. heritageManagement
    Indicates the management, preservation, and regulation of cultural or natural heritage resources by responsible entities.
  • E. heritageComponent
    Indicates that one entity forms a constituent or contributing part of another entity’s cultural or historical heritage.
  • 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_69ca838f9e20819096ab1f236a70381a completed March 30, 2026, 2:07 p.m.
NER Named-entity recognition batch_69cc6168e3d881908c58cf11cf5f9a0e completed April 1, 2026, 12:06 a.m.
NED1 Entity disambiguation (via context triple) batch_69cfabca74888190934593d6504fbed1 completed April 3, 2026, noon
NEDg Description generation batch_69cfac9c743c8190a26f753111f07281 completed April 3, 2026, 12:03 p.m.
NED2 Entity disambiguation (via description) batch_69cfad54cf5c81908558fd4c21f2f3b6 completed April 3, 2026, 12:06 p.m.
PD Predicate disambiguation batch_69cc5c2956788190a311c647b4da17a6 completed March 31, 2026, 11:43 p.m.
Created at: March 30, 2026, 6:53 p.m.