Triple

T94990
Position Surface form Disambiguated ID Type / Status
Subject Chicago Transit Authority E1910 entity
Predicate operatesSystem P3941 FINISHED
Object Chicago "L" E15398 NE FINISHED

How this triple was built (3 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: Chicago "L" | Statement: [Chicago Transit Authority, operatesSystem, Chicago "L"]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Chicago "L"
Context triple: [Chicago Transit Authority, operatesSystem, Chicago "L"]
  • A. Chicago "L" chosen
    The Chicago "L" is the elevated rapid transit system serving Chicago and some surrounding suburbs, known for its iconic above-ground tracks and extensive urban rail network.
  • B. Metra
    Metra is the commuter rail system serving the Chicago metropolitan area, operating extensive routes that connect the city with its surrounding suburbs.
  • C. Chicago Surface Lines
    Chicago Surface Lines was a privately operated streetcar and bus system that provided most of Chicago’s surface public transportation in the first half of the 20th century.
  • D. Orange Line
    The Orange Line is one of the primary rapid transit routes in the Washington Metro system, running east–west through Washington, D.C. and its Virginia and Maryland suburbs.
  • E. Orange Line
    The Orange Line is a rapid transit route in Chicago that connects the city's Loop with Midway International Airport as part of the Chicago "L" system.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
PD Predicate disambiguation gpt-5-mini-2025-08-07 
Target predicate: operatesSystem
Context triple: [Chicago Transit Authority, operatesSystem, Chicago "L"]
  • A. operatingSystem
    Indicates that one entity is the operating system running on, or used by, another entity.
  • B. platforms
    Indicates that one entity provides or serves as a base, medium, or environment that supports the operation, distribution, or presentation of another entity.
  • C. system
    Indicates that an entity functions as or belongs to a structured, organized set of components or processes that operate together as a system.
  • D. hasPlatformType
    Indicates that an entity is associated with or characterized by a specific type or category of platform.
  • E. operationType
    Indicates the specific kind of operation or action being performed or recorded in the relationship between entities.
  • 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_69a24d4862f881908cc8b89d3a78031d completed Feb. 28, 2026, 2:04 a.m.
NER Named-entity recognition batch_69a24feef1b08190bb9525f71cce053e completed Feb. 28, 2026, 2:16 a.m.
NED1 Entity disambiguation (via context triple) batch_69a3672af4fc8190a99265c93181be5d completed Feb. 28, 2026, 10:07 p.m.
PD Predicate disambiguation batch_69a24ebb3da08190a8b82564f33cde3b completed Feb. 28, 2026, 2:11 a.m.
PDg Predicate description generation batch_69a24fed6b8c819080a6c0cd3b16e6bd completed Feb. 28, 2026, 2:16 a.m.
Created at: Feb. 28, 2026, 2:09 a.m.