Triple

T7082409
Position Surface form Disambiguated ID Type / Status
Subject London Underground Central line E164986 entity
Predicate formerExtension P60482 FINISHED
Object Epping to Ongar branch
The Epping to Ongar branch was a rural stretch of railway in Essex that once formed the outermost section of the London Underground’s Central line before its closure in the 1990s.
E640226 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: Epping to Ongar branch | Statement: [London Underground Central line, formerExtension, Epping to Ongar branch]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Epping to Ongar branch
Context triple: [London Underground Central line, formerExtension, Epping to Ongar branch]
  • A. Chingford branch line
    The Chingford branch line is a suburban railway route in northeast London that connects central London with the Chingford area, serving several intermediate stations along the way.
  • B. Romford–Upminster line
    The Romford–Upminster line is a short suburban railway in east London linking Romford and Upminster, operated as part of the London Overground network.
  • C. Hertford East branch line
    The Hertford East branch line is a suburban railway line in Hertfordshire, England, providing passenger services between Hertford East and the main rail network via the Lea Valley corridor.
  • D. Gospel Oak to Barking line
    The Gospel Oak to Barking line is a London Overground suburban railway route in north and east London, known for linking Gospel Oak with Barking and serving as an important orbital connection outside central London.
  • E. Shenfield–Southend Line
    The Shenfield–Southend Line is a suburban railway route in Essex, England, connecting Shenfield with Southend and serving intermediate communities including Southend Airport.
  • 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: Epping to Ongar branch
Triple: [London Underground Central line, formerExtension, Epping to Ongar branch]
Generated description
The Epping to Ongar branch was a rural stretch of railway in Essex that once formed the outermost section of the London Underground’s Central line before its closure in the 1990s.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Epping to Ongar branch
Target entity description: The Epping to Ongar branch was a rural stretch of railway in Essex that once formed the outermost section of the London Underground’s Central line before its closure in the 1990s.
  • A. Chingford branch line
    The Chingford branch line is a suburban railway route in northeast London that connects central London with the Chingford area, serving several intermediate stations along the way.
  • B. Romford–Upminster line
    The Romford–Upminster line is a short suburban railway in east London linking Romford and Upminster, operated as part of the London Overground network.
  • C. Hertford East branch line
    The Hertford East branch line is a suburban railway line in Hertfordshire, England, providing passenger services between Hertford East and the main rail network via the Lea Valley corridor.
  • D. Gospel Oak to Barking line
    The Gospel Oak to Barking line is a London Overground suburban railway route in north and east London, known for linking Gospel Oak with Barking and serving as an important orbital connection outside central London.
  • E. Shenfield–Southend Line
    The Shenfield–Southend Line is a suburban railway route in Essex, England, connecting Shenfield with Southend and serving intermediate communities including Southend Airport.
  • 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_69c6887d98408190912b9580666b0c1d completed March 27, 2026, 1:39 p.m.
NER Named-entity recognition batch_69c6e50f133c81908c5f7336fd5bc5d2 completed March 27, 2026, 8:14 p.m.
NED1 Entity disambiguation (via context triple) batch_69c7947c32f081909340b05a46ae7bdd completed March 28, 2026, 8:42 a.m.
NEDg Description generation batch_69c79523b1e881909b7f31a20f03d4b3 completed March 28, 2026, 8:45 a.m.
NED2 Entity disambiguation (via description) batch_69c795e542d881909defeb4056898495 completed March 28, 2026, 8:48 a.m.
Created at: March 27, 2026, 2:40 p.m.