Triple

T5842017
Position Surface form Disambiguated ID Type / Status
Subject Central Trains E129614 entity
Predicate operatedRollingStockType P1305 FINISHED
Object Class 156 diesel multiple unit
The Class 156 diesel multiple unit is a British two-car regional train type introduced in the late 1980s for local and medium-distance passenger services.
 E555702 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: Class 156 diesel multiple unit | Statement: [Central Trains, operatedRollingStockType, Class 156 diesel multiple unit]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Class 156 diesel multiple unit
Context triple: [Central Trains, operatedRollingStockType, Class 156 diesel multiple unit]
  • A. Class 150 diesel multiple unit
    The Class 150 diesel multiple unit is a British two- or three-car regional passenger train introduced in the 1980s and widely used on local and suburban services across the UK rail network.
  • B. Class 153 diesel multiple unit
    The Class 153 diesel multiple unit is a single-car British regional train used primarily for local and rural passenger services on non-electrified lines.
  • C. British Rail Class 153
    The British Rail Class 153 is a single-car diesel multiple unit train used on regional and rural passenger services across the UK rail network.
  • D. British Rail Class 171
    The British Rail Class 171 is a diesel multiple unit train used primarily by Southern in the UK, closely related to the Class 170 but equipped with different coupling systems for compatibility with other Southern stock.
  • E. British Rail Class 168
    The British Rail Class 168 is a diesel multiple-unit train used primarily by Chiltern Railways for regional and intercity services in the United Kingdom.
  • 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: Class 156 diesel multiple unit
Triple: [Central Trains, operatedRollingStockType, Class 156 diesel multiple unit]
Generated description
The Class 156 diesel multiple unit is a British two-car regional train type introduced in the late 1980s for local and medium-distance passenger services.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Class 156 diesel multiple unit
Target entity description: The Class 156 diesel multiple unit is a British two-car regional train type introduced in the late 1980s for local and medium-distance passenger services.
  • A. Class 150 diesel multiple unit
    The Class 150 diesel multiple unit is a British two- or three-car regional passenger train introduced in the 1980s and widely used on local and suburban services across the UK rail network.
  • B. Class 153 diesel multiple unit
    The Class 153 diesel multiple unit is a single-car British regional train used primarily for local and rural passenger services on non-electrified lines.
  • C. British Rail Class 153
    The British Rail Class 153 is a single-car diesel multiple unit train used on regional and rural passenger services across the UK rail network.
  • D. British Rail Class 171
    The British Rail Class 171 is a diesel multiple unit train used primarily by Southern in the UK, closely related to the Class 170 but equipped with different coupling systems for compatibility with other Southern stock.
  • E. British Rail Class 168
    The British Rail Class 168 is a diesel multiple-unit train used primarily by Chiltern Railways for regional and intercity services in the United Kingdom.
  • 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_69c0084bd31c8190a796bb6284845e83 completed March 22, 2026, 3:18 p.m.
NER Named-entity recognition batch_69c034d876fc819089818c731116af56 completed March 22, 2026, 6:28 p.m.
NED1 Entity disambiguation (via context triple) batch_69c0bfce88f88190bbc78ce9c7c3c107 completed March 23, 2026, 4:21 a.m.
NEDg Description generation batch_69c0c2061aa08190977959353dd93bee completed March 23, 2026, 4:31 a.m.
NED2 Entity disambiguation (via description) batch_69c0c2638d3481909876fc917a61dde9 completed March 23, 2026, 4:32 a.m.
Created at: March 22, 2026, 3:54 p.m.