Triple

T19397021
Position Surface form Disambiguated ID Type / Status
Subject Colindale Underground station E485217 entity
Predicate openedBy P421 FINISHED
Object London Electric Railway
London Electric Railway was an early 20th-century underground railway company in London that developed and operated several key lines of what is now the London Underground network.
E1373665 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: London Electric Railway | Statement: [Colindale Underground station, openedBy, London Electric Railway]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: London Electric Railway
Context triple: [Colindale Underground station, openedBy, London Electric Railway]
  • A. Underground Electric Railways Company of London
    The Underground Electric Railways Company of London was the early 20th-century holding company that developed and operated much of London's deep-level tube network, forming the core of what became the London Underground.
  • B. Central London Railway
    Central London Railway was an early deep-level underground railway in London that later became the core of the London Underground's Central line.
  • C. Metropolitan Railway
    The Metropolitan Railway was the pioneering underground railway in London and the world’s first urban underground passenger railway, forming the core of what became the London Underground.
  • D. United Railways and Electric Company
    United Railways and Electric Company was a major early 20th-century streetcar and electric transit operator in Baltimore, Maryland, that formed the backbone of the city’s public transportation system before its successor companies.
  • E. Great Northern, Piccadilly and Brompton Railway
    The Great Northern, Piccadilly and Brompton Railway was an early 20th-century deep-level London Underground railway company that formed the core of what is now the Piccadilly line.
  • 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: London Electric Railway
Triple: [Colindale Underground station, openedBy, London Electric Railway]
Generated description
London Electric Railway was an early 20th-century underground railway company in London that developed and operated several key lines of what is now the London Underground network.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: London Electric Railway
Target entity description: London Electric Railway was an early 20th-century underground railway company in London that developed and operated several key lines of what is now the London Underground network.
  • A. Underground Electric Railways Company of London
    The Underground Electric Railways Company of London was the early 20th-century holding company that developed and operated much of London's deep-level tube network, forming the core of what became the London Underground.
  • B. Central London Railway
    Central London Railway was an early deep-level underground railway in London that later became the core of the London Underground's Central line.
  • C. Metropolitan Railway
    The Metropolitan Railway was the pioneering underground railway in London and the world’s first urban underground passenger railway, forming the core of what became the London Underground.
  • D. United Railways and Electric Company
    United Railways and Electric Company was a major early 20th-century streetcar and electric transit operator in Baltimore, Maryland, that formed the backbone of the city’s public transportation system before its successor companies.
  • E. Great Northern, Piccadilly and Brompton Railway
    The Great Northern, Piccadilly and Brompton Railway was an early 20th-century deep-level London Underground railway company that formed the core of what is now the Piccadilly line.
  • 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_69d8e8d5162481909db12435d9535c1a completed April 10, 2026, 12:11 p.m.
NER Named-entity recognition batch_69e62573f5788190a635b92121db2cf7 completed April 20, 2026, 1:09 p.m.
NED1 Entity disambiguation (via context triple) batch_6a072b8dd70c8190870a8478a111b887 completed May 15, 2026, 2:19 p.m.
NEDg Description generation batch_6a072e41ca0c8190a6d85eaa76d00de8 completed May 15, 2026, 2:31 p.m.
NED2 Entity disambiguation (via description) batch_6a072eb872b88190904f9947228066fb completed May 15, 2026, 2:33 p.m.
Created at: April 10, 2026, 1:36 p.m.