Triple

T21132571
Position Surface form Disambiguated ID Type / Status
Subject London St Pancras – Nottingham E520724 entity
Predicate formerOperator P179 FINISHED
Object East Midlands Trains
East Midlands Trains was a British train operating company that ran intercity and regional passenger rail services across the East Midlands and surrounding regions from 2007 to 2019.
 E21789 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: East Midlands Trains | Statement: [London St Pancras – Nottingham, formerOperator, East Midlands Trains]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: East Midlands Trains
Context triple: [London St Pancras – Nottingham, formerOperator, East Midlands Trains]
  • A. Northern Trains
    Northern Trains is a British train operating company that runs local and regional passenger rail services across Northern England.
  • B. North West Trains
    North West Trains was a British train operating company that ran regional and commuter rail services in North West England following rail privatization in the mid-1990s.
  • C. Northern Rail
    Northern Rail is a British train operating company providing regional and commuter rail services across Northern England.
  • D. TransPennine Express
    TransPennine Express is a British train operating company providing intercity and regional rail services across northern England and into Scotland.
  • E. East Midlands Railway
    East Midlands Railway is a British train operating company providing regional and intercity passenger rail services across the East Midlands and 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: East Midlands Trains
Triple: [London St Pancras – Nottingham, formerOperator, East Midlands Trains]
Generated description
East Midlands Trains was a British train operating company that ran intercity and regional passenger rail services across the East Midlands and surrounding regions from 2007 to 2019.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: East Midlands Trains
Target entity description: East Midlands Trains was a British train operating company that ran intercity and regional passenger rail services across the East Midlands and surrounding regions from 2007 to 2019.
  • A. Northern Trains
    Northern Trains is a British train operating company that runs local and regional passenger rail services across Northern England.
  • B. North West Trains
    North West Trains was a British train operating company that ran regional and commuter rail services in North West England following rail privatization in the mid-1990s.
  • C. Northern Rail
    Northern Rail is a British train operating company providing regional and commuter rail services across Northern England.
  • D. TransPennine Express
    TransPennine Express is a British train operating company providing intercity and regional rail services across northern England and into Scotland.
  • E. East Midlands Railway chosen
    East Midlands Railway is a British train operating company providing regional and intercity passenger rail services across the East Midlands and surrounding areas.
  • F. None of above.

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_69e0b50b53048190ae34e8abbe3c5ada completed April 16, 2026, 10:08 a.m.
NER Named-entity recognition batch_69e723574b1481909fe9bebc83f1f3ce completed April 21, 2026, 7:12 a.m.
NED1 Entity disambiguation (via context triple) batch_6a097ebb1b448190b31c23a480dfecae completed May 17, 2026, 8:39 a.m.
NEDg Description generation batch_6a097f7635f08190bf9552d4aa05063e completed May 17, 2026, 8:42 a.m.
NED2 Entity disambiguation (via description) batch_6a098037ffa4819095b1482d6bd83583 completed May 17, 2026, 8:45 a.m.
Created at: April 16, 2026, 2:56 p.m.