Triple

T17673896
Position Surface form Disambiguated ID Type / Status
Subject O'Hare–Forest Park corridor E440594 entity
Predicate hasKeyStation P22144 FINISHED
Object Jackson station (CTA Blue Line)
Jackson station is an underground Chicago Transit Authority Blue Line station in downtown Chicago’s Loop, serving as a major transfer point and access hub for the city’s central business district.
E323946 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: Jackson station (CTA Blue Line) | Statement: [O'Hare–Forest Park corridor, hasKeyStation, Jackson station (CTA Blue Line)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Jackson station (CTA Blue Line)
Context triple: [O'Hare–Forest Park corridor, hasKeyStation, Jackson station (CTA Blue Line)]
  • A. Jackson (CTA Red Line station)
    Jackson is a major Chicago Transit Authority Red Line subway station located in downtown Chicago’s Loop, serving as a key transfer point within the city’s rapid transit system.
  • B. Howard station (CTA Red Line)
    Howard station (CTA Red Line) is a major Chicago Transit Authority rail terminal on the city’s North Side that serves as an interchange between the Red, Purple, and Yellow Lines.
  • C. Paulina station (CTA)
    Paulina station (CTA) was a former Chicago 'L' rapid transit station on the Brown Line located in the Lakeview neighborhood.
  • D. Pulaski station (CTA Orange Line)
    Pulaski station (CTA Orange Line) is an elevated rapid transit stop on Chicago’s Orange Line serving the West Elsdon neighborhood near Midway Airport.
  • E. Argyle station (CTA)
    Argyle station (CTA) is an elevated Chicago 'L' rapid transit stop on the Red Line serving the Uptown neighborhood’s Argyle Street area.
  • 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: Jackson station (CTA Blue Line)
Triple: [O'Hare–Forest Park corridor, hasKeyStation, Jackson station (CTA Blue Line)]
Generated description
Jackson station is an underground Chicago Transit Authority Blue Line station in downtown Chicago’s Loop, serving as a major transfer point and access hub for the city’s central business district.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Jackson station (CTA Blue Line)
Target entity description: Jackson station is an underground Chicago Transit Authority Blue Line station in downtown Chicago’s Loop, serving as a major transfer point and access hub for the city’s central business district.
  • A. Jackson (CTA Red Line station) chosen
    Jackson is a major Chicago Transit Authority Red Line subway station located in downtown Chicago’s Loop, serving as a key transfer point within the city’s rapid transit system.
  • B. Howard station (CTA Red Line)
    Howard station (CTA Red Line) is a major Chicago Transit Authority rail terminal on the city’s North Side that serves as an interchange between the Red, Purple, and Yellow Lines.
  • C. Paulina station (CTA)
    Paulina station (CTA) was a former Chicago 'L' rapid transit station on the Brown Line located in the Lakeview neighborhood.
  • D. Pulaski station (CTA Orange Line)
    Pulaski station (CTA Orange Line) is an elevated rapid transit stop on Chicago’s Orange Line serving the West Elsdon neighborhood near Midway Airport.
  • E. Argyle station (CTA)
    Argyle station (CTA) is an elevated Chicago 'L' rapid transit stop on the Red Line serving the Uptown neighborhood’s Argyle Street area.
  • F. None of above.

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_69d8b9e87e18819087104a44dc4dc5b1 completed April 10, 2026, 8:50 a.m.
NER Named-entity recognition batch_69e46f6ba22081909e2099490c047378 completed April 19, 2026, 6 a.m.
NED1 Entity disambiguation (via context triple) batch_6a0242e7b48481908af4b941018c030e completed May 11, 2026, 8:58 p.m.
NEDg Description generation batch_6a0247aa9de481909928482ba6743dd0 completed May 11, 2026, 9:18 p.m.
NED2 Entity disambiguation (via description) batch_6a024804678c819087adb7face3087ec completed May 11, 2026, 9:20 p.m.
Created at: April 10, 2026, 10 a.m.