Triple

T10896328
Position Surface form Disambiguated ID Type / Status
Subject BR Standard Class 4 steam locomotives E257318 entity
Predicate regionOfOperation P794 FINISHED
Object British Railways Southern Region E409292 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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 Railways Southern Region | Statement: [BR Standard Class 4 steam locomotives, regionOfOperation, British Railways Southern Region]

Disambiguation candidates (1 decision)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: British Railways Southern Region
Context triple: [BR Standard Class 4 steam locomotives, regionOfOperation, British Railways Southern Region]
  • A. British Railways Western Region
    British Railways Western Region was the post-nationalisation division of British Rail responsible for former Great Western Railway routes across western and southwestern England and South Wales.
  • B. Southern Region of British Railways chosen
    The Southern Region of British Railways was one of the post-nationalisation operating regions in the south of England, known for its dense commuter network and extensive electrified lines serving London and the surrounding areas.
  • C. British Rail Eastern Region
    British Rail Eastern Region was a major operating division of British Railways responsible for rail services across eastern England, inheriting much of the former London and North Eastern Railway network.
  • D. Southern Railway (UK)
    Southern Railway (UK) was a major British railway company formed in 1923 that operated routes in southern England, including busy commuter and coastal lines, until nationalisation in 1948.
  • E. British Railways London Midland Region
    British Railways London Midland Region was the post-nationalisation division of British Railways responsible for former London, Midland and Scottish Railway routes, including the operation of locomotives such as the LMS Black Five.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 batches)

Stage Batch ID Job type Status
creating batch_69d6aa8550c8819095508a2ed9acf3db elicitation completed
NER batch_69d75d022f4c81909cd9ea27a9f0cd32 ner completed
NED1 batch_69e216b417bc8190b35477e9d363a289 ned_source_triple completed
Created at: April 8, 2026, 9:21 p.m.