Triple

T9664795
Position Surface form Disambiguated ID Type / Status
Subject Cambrian Coast Line E233675 entity
Predicate usesSignallingSystem P19148 FINISHED
Object ERTMS Level 2 E222799 NE FINISHED

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: ERTMS Level 2 | Statement: [Cambrian Coast Line, usesSignallingSystem, ERTMS Level 2]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: ERTMS Level 2
Context triple: [Cambrian Coast Line, usesSignallingSystem, ERTMS Level 2]
  • A. ETCS Level 2 chosen
    ETCS Level 2 is an advanced European train control and signalling standard that enables continuous, cab-based train supervision and high-speed, high-capacity railway operations.
  • B. ETCS Level 3
    ETCS Level 3 is an advanced, moving-block train control standard that enables continuous train integrity supervision and higher line capacity within the European Train Control System.
  • C. ETCS Level 1
    ETCS Level 1 is a standardized European train control and signaling system level that uses trackside equipment and intermittent data transmission to supervise train speed and movement authority.
  • D. 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.
  • E. European Train Control System
    The European Train Control System (ETCS) is a standardized, interoperable train signaling and control system used across Europe and in high-speed railways worldwide to enhance safety and efficiency.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 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_69ca848d3b6c8190ae98ea554dea58df completed March 30, 2026, 2:11 p.m.
NER Named-entity recognition batch_69cd9c0e1ef481909c50a4ba5fd94583 completed April 1, 2026, 10:28 p.m.
NED1 Entity disambiguation (via context triple) batch_69d18a17eea08190825404b01b0e8d96 completed April 4, 2026, 10 p.m.
Created at: March 30, 2026, 8:14 p.m.