Triple

T20025184
Position Surface form Disambiguated ID Type / Status
Subject CN Joliet Subdivision E494961 entity
Predicate partOf P40 FINISHED
Object CN Chicago-area rail network — NE NERFINISHED

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: CN Chicago-area rail network | Statement: [CN Joliet Subdivision, partOf, CN Chicago-area rail network]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: CN Chicago-area rail network
Context triple: [CN Joliet Subdivision, partOf, CN Chicago-area rail network]
  • A. Chicago metropolitan area commuter rail network
    The Chicago metropolitan area commuter rail network is a regional passenger rail system serving Chicago and its surrounding suburbs, primarily operated by Metra.
  • B. Chicago and North Western Railway commuter network
    The Chicago and North Western Railway commuter network was a suburban passenger rail system serving the Chicago metropolitan area, operating multiple lines that connected downtown Chicago with its outlying communities.
  • C. CN Chicago Subdivision
    The CN Chicago Subdivision is a key Canadian National Railway freight and passenger rail line in the Chicago area that forms part of an important corridor used by Amtrak services.
  • D. Metra commuter rail services at Chicago Union Station
    Metra commuter rail services at Chicago Union Station are a network of regional passenger trains that connect downtown Chicago with its surrounding suburbs via multiple lines terminating or passing through this major terminal.
  • E. CTA rail network
    The CTA rail network is the rapid transit system serving Chicago and several surrounding suburbs, commonly known as the "L" and consisting of multiple color-coded lines operating on elevated, subway, and at-grade tracks.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: CN Chicago-area rail network
Target entity description: The CN Chicago-area rail network is a major freight rail system operated by Canadian National Railway that serves the greater Chicago region, connecting multiple subdivisions and key industrial and intermodal hubs.
  • A. Chicago metropolitan area commuter rail network
    The Chicago metropolitan area commuter rail network is a regional passenger rail system serving Chicago and its surrounding suburbs, primarily operated by Metra.
  • B. Chicago and North Western Railway commuter network
    The Chicago and North Western Railway commuter network was a suburban passenger rail system serving the Chicago metropolitan area, operating multiple lines that connected downtown Chicago with its outlying communities.
  • C. CN Chicago Subdivision chosen
    The CN Chicago Subdivision is a key Canadian National Railway freight and passenger rail line in the Chicago area that forms part of an important corridor used by Amtrak services.
  • D. Metra commuter rail services at Chicago Union Station
    Metra commuter rail services at Chicago Union Station are a network of regional passenger trains that connect downtown Chicago with its surrounding suburbs via multiple lines terminating or passing through this major terminal.
  • E. CTA rail network
    The CTA rail network is the rapid transit system serving Chicago and several surrounding suburbs, commonly known as the "L" and consisting of multiple color-coded lines operating on elevated, subway, and at-grade tracks.
  • F. None of above.

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_69da626bfd288190aa5d65098b6433ae completed April 11, 2026, 3:02 p.m.
NER Named-entity recognition batch_69e6628d5b8c8190a35f95ac4a016550 completed April 20, 2026, 5:29 p.m.
Created at: April 11, 2026, 3:35 p.m.