Triple

T6522838
Position Surface form Disambiguated ID Type / Status
Subject Waterloo–Reading line E151226 entity
Predicate primaryRollingStock P1305 FINISHED
Object British Rail Class 458
The British Rail Class 458 is a fleet of electric multiple-unit passenger trains used for suburban and regional services in the south of England, particularly around London.
 E661278 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: British Rail Class 458 | Statement: [Waterloo–Reading line, primaryRollingStock, British Rail Class 458]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: British Rail Class 458
Context triple: [Waterloo–Reading line, primaryRollingStock, British Rail Class 458]
  • A. British Rail Class 465
    The British Rail Class 465 is a family of electric multiple-unit commuter trains used primarily on suburban routes in Southeast England, particularly around London.
  • B. British Rail Class 466
    The British Rail Class 466 is a type of electric multiple unit train used on suburban and commuter services in Southeast England as part of the Networker family.
  • C. British Rail Class 387
    The British Rail Class 387 is a fleet of modern electric multiple-unit trains used on high-speed commuter and airport services in the UK.
  • D. British Rail Class 444
    The British Rail Class 444 is a fleet of modern electric multiple-unit passenger trains used by South Western Railway for long-distance services on routes including those from London Waterloo.
  • E. British Rail Class 395
    The British Rail Class 395 is a high-speed electric multiple unit train used in the UK, best known for operating Southeastern’s domestic services on High Speed 1 between London and Kent.
  • 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: British Rail Class 458
Triple: [Waterloo–Reading line, primaryRollingStock, British Rail Class 458]
Generated description
The British Rail Class 458 is a fleet of electric multiple-unit passenger trains used for suburban and regional services in the south of England, particularly around London.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: British Rail Class 458
Target entity description: The British Rail Class 458 is a fleet of electric multiple-unit passenger trains used for suburban and regional services in the south of England, particularly around London.
  • A. British Rail Class 465
    The British Rail Class 465 is a family of electric multiple-unit commuter trains used primarily on suburban routes in Southeast England, particularly around London.
  • B. British Rail Class 466
    The British Rail Class 466 is a type of electric multiple unit train used on suburban and commuter services in Southeast England as part of the Networker family.
  • C. British Rail Class 387
    The British Rail Class 387 is a fleet of modern electric multiple-unit trains used on high-speed commuter and airport services in the UK.
  • D. British Rail Class 444
    The British Rail Class 444 is a fleet of modern electric multiple-unit passenger trains used by South Western Railway for long-distance services on routes including those from London Waterloo.
  • E. British Rail Class 395
    The British Rail Class 395 is a high-speed electric multiple unit train used in the UK, best known for operating Southeastern’s domestic services on High Speed 1 between London and Kent.
  • 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_69c687f522748190b3058405553cdabd completed March 27, 2026, 1:36 p.m.
NER Named-entity recognition batch_69c6ad95c2c88190b800aaaa73f99210 completed March 27, 2026, 4:17 p.m.
NED1 Entity disambiguation (via context triple) batch_69c8109adff8819081426b44ae70bdfb completed March 28, 2026, 5:32 p.m.
NEDg Description generation batch_69c811a94bd48190b9102aa7d4f1dde8 completed March 28, 2026, 5:36 p.m.
NED2 Entity disambiguation (via description) batch_69c8127599188190af3d049a0c6dd349 completed March 28, 2026, 5:40 p.m.
Created at: March 27, 2026, 1:45 p.m.