Triple

T21061178
Position Surface form Disambiguated ID Type / Status
Subject Holborn Viaduct station E518849 entity
Predicate connectedTo P37 FINISHED
Object Snow Hill tunnel
Snow Hill tunnel is a historic railway tunnel in central London that carries trains beneath the city between the north–south main lines.
 E1465241 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: Snow Hill tunnel | Statement: [Holborn Viaduct station, connectedTo, Snow Hill tunnel]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Snow Hill tunnel
Context triple: [Holborn Viaduct station, connectedTo, Snow Hill tunnel]
  • A. Primrose Hill Tunnel
    Primrose Hill Tunnel is a historic railway tunnel in London that formed part of the early main line route of the London and Birmingham Railway.
  • B. Rotherhithe Tunnel
    Rotherhithe Tunnel is a road tunnel beneath the River Thames in London, linking the areas of Rotherhithe and Limehouse.
  • C. Limehouse Link Tunnel
    The Limehouse Link Tunnel is a major road tunnel in East London that provides a key underground route between the City and Docklands, easing traffic flow to and from Canary Wharf.
  • D. North Downs Tunnel
    North Downs Tunnel is a major railway tunnel in southeast England that carries High Speed 1 beneath the North Downs hills.
  • E. City Tunnel No. 1
    City Tunnel No. 1 is a major New York City water supply tunnel that conveys drinking water from upstate reservoirs into the city’s distribution system.
  • 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: Snow Hill tunnel
Triple: [Holborn Viaduct station, connectedTo, Snow Hill tunnel]
Generated description
Snow Hill tunnel is a historic railway tunnel in central London that carries trains beneath the city between the north–south main lines.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Snow Hill tunnel
Target entity description: Snow Hill tunnel is a historic railway tunnel in central London that carries trains beneath the city between the north–south main lines.
  • A. Primrose Hill Tunnel
    Primrose Hill Tunnel is a historic railway tunnel in London that formed part of the early main line route of the London and Birmingham Railway.
  • B. Rotherhithe Tunnel
    Rotherhithe Tunnel is a road tunnel beneath the River Thames in London, linking the areas of Rotherhithe and Limehouse.
  • C. Limehouse Link Tunnel
    The Limehouse Link Tunnel is a major road tunnel in East London that provides a key underground route between the City and Docklands, easing traffic flow to and from Canary Wharf.
  • D. North Downs Tunnel
    North Downs Tunnel is a major railway tunnel in southeast England that carries High Speed 1 beneath the North Downs hills.
  • E. City Tunnel No. 1
    City Tunnel No. 1 is a major New York City water supply tunnel that conveys drinking water from upstate reservoirs into the city’s distribution system.
  • 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_69e0b505ef108190b25dd4033e2ff7eb completed April 16, 2026, 10:08 a.m.
NER Named-entity recognition batch_69e6feaf3edc81909423e039cac6bd87 completed April 21, 2026, 4:35 a.m.
NED1 Entity disambiguation (via context triple) batch_6a09506d7de881909dd7564628f142e5 completed May 17, 2026, 5:21 a.m.
NEDg Description generation batch_6a09532354a48190bc275453ec866126 completed May 17, 2026, 5:33 a.m.
NED2 Entity disambiguation (via description) batch_6a095382a3808190ae6efd040225fbdd completed May 17, 2026, 5:34 a.m.
Created at: April 16, 2026, 2:38 p.m.