Triple

T21637334
Position Surface form Disambiguated ID Type / Status
Subject Metra commuter rail services at Chicago Union Station E533993 entity
Predicate governingBody P46 FINISHED
Object Regional Transportation Authority of Northeastern Illinois — NE NERFINISHED

How this triple was built (2 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: Regional Transportation Authority of Northeastern Illinois | Statement: [Metra commuter rail services at Chicago Union Station, governingBody, Regional Transportation Authority of Northeastern Illinois]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Regional Transportation Authority of Northeastern Illinois
Context triple: [Metra commuter rail services at Chicago Union Station, governingBody, Regional Transportation Authority of Northeastern Illinois]
  • A. Regional Transportation Authority of Northeastern Illinois chosen
    The Regional Transportation Authority of Northeastern Illinois is the oversight and funding agency that coordinates public transit services, including those of the Chicago Transit Authority, across the Chicago metropolitan area.
  • B. Sangamon Mass Transit District
    Sangamon Mass Transit District is the primary public bus transportation agency serving Springfield and surrounding areas in Sangamon County, Illinois.
  • C. Champaign–Urbana Mass Transit District
    The Champaign–Urbana Mass Transit District is the primary public bus system serving the Champaign–Urbana metropolitan area and the University of Illinois campus in Illinois.
  • D. Chicago Transit Authority
    The Chicago Transit Authority is the primary public transportation agency serving Chicago and several surrounding suburbs, operating the city’s extensive network of buses and rapid transit trains.
  • E. Minnesota Valley Transit Authority
    Minnesota Valley Transit Authority is a public bus agency serving suburban communities in the southern Twin Cities metropolitan area of Minnesota.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 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_69e0c465ae7481908577b7209fdb2a77 completed April 16, 2026, 11:13 a.m.
NER Named-entity recognition batch_69ef538eef0481908f5bf0e27f8e054d completed April 27, 2026, 12:16 p.m.
Created at: April 16, 2026, 6:35 p.m.