Triple

T23196045
Position Surface form Disambiguated ID Type / Status
Subject British Rail second-generation DMUs E579870 entity
Predicate safety system P12725 FINISHED
Object TPWS (retrofitted or fitted in service) — NE NERFINISHED

How this triple was built (2 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: TPWS (retrofitted or fitted in service) | Statement: [British Rail second-generation DMUs, safety system, TPWS (retrofitted or fitted in service)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: TPWS (retrofitted or fitted in service)
Context triple: [British Rail second-generation DMUs, safety system, TPWS (retrofitted or fitted in service)]
  • A. TPWS chosen
    TPWS (Train Protection & Warning System) is a UK railway safety system that automatically applies a train’s brakes to prevent collisions and overspeeding, particularly at signals and speed restrictions.
  • B. Train Protection & Warning System
    Train Protection & Warning System is a British railway safety system designed to automatically stop or slow trains to prevent collisions and signal passed at danger incidents.
  • C. Siemens Trainguard MT
    Siemens Trainguard MT is a communications-based train control (CBTC) signaling system developed by Siemens for fully automated and driverless metro and urban rail operations.
  • D. Positive Train Control
    Positive Train Control is an advanced, federally mandated train safety technology designed to automatically prevent collisions, overspeed derailments, and other dangerous train movements.
  • E. Automatic Train Operation (ATO)
    Automatic Train Operation (ATO) is a railway control system that automates key driving functions such as acceleration, speed regulation, and braking to improve safety, efficiency, and consistency of train operations.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 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_69e24600eed08190bd7e5295653a1503 completed April 17, 2026, 2:38 p.m.
NER Named-entity recognition batch_69f18fdb279c81908dcc46f2786a86cd completed April 29, 2026, 4:58 a.m.
Created at: April 17, 2026, 4:06 p.m.