Triple

T409644
Position Surface form Disambiguated ID Type / Status
Subject London Euston E9460 entity
Predicate formerFeature P9789 FINISHED
Object Euston Arch
Euston Arch was a monumental neoclassical gateway that once served as the grand entrance to London’s Euston railway station before its controversial demolition in the 1960s.
E51946 NE FINISHED

How this triple was built (5 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: Euston Arch | Statement: [London Euston, formerFeature, Euston Arch]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Euston Arch
Context triple: [London Euston, formerFeature, Euston Arch]
  • A. Admiralty Arch
    Admiralty Arch is a grand ceremonial gateway in London that links The Mall to Trafalgar Square and serves as an iconic example of Edwardian Baroque architecture.
  • B. Tower Bridge
    Tower Bridge is a combined bascule and suspension bridge over the River Thames in London, renowned for its twin Gothic-style towers and status as one of the city's most famous landmarks.
  • C. Tower Bridge
    Tower Bridge is an iconic yellow-gold vertical-lift bridge spanning the Sacramento River, connecting West Sacramento to downtown Sacramento in California.
  • D. Hammersmith Bridge
    Hammersmith Bridge is a historic 19th-century suspension bridge in west London that carries traffic across the River Thames between Hammersmith and Barnes.
  • E. Westminster Bridge
    Westminster Bridge is a historic road and foot traffic bridge in central London that spans the River Thames between Westminster and Lambeth, adjacent to landmarks like the Houses of Parliament and Big Ben.
  • 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: Euston Arch
Triple: [London Euston, formerFeature, Euston Arch]
Generated description
Euston Arch was a monumental neoclassical gateway that once served as the grand entrance to London’s Euston railway station before its controversial demolition in the 1960s.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Euston Arch
Target entity description: Euston Arch was a monumental neoclassical gateway that once served as the grand entrance to London’s Euston railway station before its controversial demolition in the 1960s.
  • A. Admiralty Arch
    Admiralty Arch is a grand ceremonial gateway in London that links The Mall to Trafalgar Square and serves as an iconic example of Edwardian Baroque architecture.
  • B. Tower Bridge
    Tower Bridge is a combined bascule and suspension bridge over the River Thames in London, renowned for its twin Gothic-style towers and status as one of the city's most famous landmarks.
  • C. Tower Bridge
    Tower Bridge is an iconic yellow-gold vertical-lift bridge spanning the Sacramento River, connecting West Sacramento to downtown Sacramento in California.
  • D. Hammersmith Bridge
    Hammersmith Bridge is a historic 19th-century suspension bridge in west London that carries traffic across the River Thames between Hammersmith and Barnes.
  • E. Westminster Bridge
    Westminster Bridge is a historic road and foot traffic bridge in central London that spans the River Thames between Westminster and Lambeth, adjacent to landmarks like the Houses of Parliament and Big Ben.
  • F. None of above. chosen
PD Predicate disambiguation gpt-5-mini-2025-08-07
Target predicate: formerFeature
Context triple: [London Euston, formerFeature, Euston Arch]
  • A. formerFunction
    Indicates that an entity previously held a specific role, position, or function but no longer does so.
  • B. formerName
    Indicates that an entity was previously known by a different name in the past.
  • C. featureType
    Indicates the specific kind or category of feature that characterizes or distinguishes an entity.
  • D. formsFeature chosen
    Indicates that one entity constitutes or creates a characteristic, component, or distinguishing element of another entity.
  • E. formerSiteOf
    Indicates that a location previously hosted or contained something (such as a structure, organization, or event) that is no longer present there.
  • F. None of above.

Provenance (6 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_69a2e80111fc8190961d5b7c6154123f completed Feb. 28, 2026, 1:05 p.m.
NER Named-entity recognition batch_69a2ed31681c8190ac32334562fb17fd completed Feb. 28, 2026, 1:27 p.m.
NED1 Entity disambiguation (via context triple) batch_69a41777d794819099a07555ad2defe2 completed March 1, 2026, 10:39 a.m.
NEDg Description generation batch_69a418da55088190935babe9abae5ac4 completed March 1, 2026, 10:45 a.m.
NED2 Entity disambiguation (via description) batch_69a4196334948190a1f6004b1a292550 completed March 1, 2026, 10:48 a.m.
PD Predicate disambiguation batch_69a2e9737694819080fde9adcc1aa4d4 completed Feb. 28, 2026, 1:11 p.m.
Created at: Feb. 28, 2026, 1:08 p.m.