Triple

T7126055
Position Surface form Disambiguated ID Type / Status
Subject Forest Park station E166064 entity
Predicate replacedStation P20874 FINISHED
Object Des Plaines Avenue station (former CTA terminal)
Des Plaines Avenue station was the former western terminal of the Chicago Transit Authority’s Blue Line in Forest Park, Illinois, before being superseded by the current Forest Park station.
 E643595 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: Des Plaines Avenue station (former CTA terminal) | Statement: [Forest Park station, replacedStation, Des Plaines Avenue station (former CTA terminal)]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Des Plaines Avenue station (former CTA terminal)
Context triple: [Forest Park station, replacedStation, Des Plaines Avenue station (former CTA terminal)]
  • A. Western Avenue station (Metra)
    Western Avenue station (Metra) is a commuter rail stop in Chicago, Illinois, serving Metra’s North Central Service and other lines as part of the city’s regional rail network.
  • B. 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.
  • C. Chicago Avenue station (CTA Purple Line)
    Chicago Avenue station (CTA Purple Line) is an elevated Chicago Transit Authority rapid transit stop in Evanston, Illinois, serving the Purple Line.
  • D. Chicago Avenue station (CTA Red Line)
    Chicago Avenue station (CTA Red Line) is an underground Chicago Transit Authority rapid transit stop on the Red Line serving the Near North Side area, including the Magnificent Mile.
  • E. Chicago Avenue station (CTA Brown Line)
    Chicago Avenue station (CTA Brown Line) is an elevated Chicago Transit Authority rapid transit stop on the Brown Line serving the Near North Side of Chicago.
  • 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: Des Plaines Avenue station (former CTA terminal)
Triple: [Forest Park station, replacedStation, Des Plaines Avenue station (former CTA terminal)]
Generated description
Des Plaines Avenue station was the former western terminal of the Chicago Transit Authority’s Blue Line in Forest Park, Illinois, before being superseded by the current Forest Park station.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: Des Plaines Avenue station (former CTA terminal)
Target entity description: Des Plaines Avenue station was the former western terminal of the Chicago Transit Authority’s Blue Line in Forest Park, Illinois, before being superseded by the current Forest Park station.
  • A. Western Avenue station (Metra)
    Western Avenue station (Metra) is a commuter rail stop in Chicago, Illinois, serving Metra’s North Central Service and other lines as part of the city’s regional rail network.
  • B. 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.
  • C. Chicago Avenue station (CTA Purple Line)
    Chicago Avenue station (CTA Purple Line) is an elevated Chicago Transit Authority rapid transit stop in Evanston, Illinois, serving the Purple Line.
  • D. Chicago Avenue station (CTA Red Line)
    Chicago Avenue station (CTA Red Line) is an underground Chicago Transit Authority rapid transit stop on the Red Line serving the Near North Side area, including the Magnificent Mile.
  • E. Chicago Avenue station (CTA Brown Line)
    Chicago Avenue station (CTA Brown Line) is an elevated Chicago Transit Authority rapid transit stop on the Brown Line serving the Near North Side of Chicago.
  • 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_69c6888350588190870cd552b427a1cd completed March 27, 2026, 1:39 p.m.
NER Named-entity recognition batch_69c6e64d99888190a93c1822e19b5457 completed March 27, 2026, 8:19 p.m.
NED1 Entity disambiguation (via context triple) batch_69c7a3357e548190bb56c31843c69f95 completed March 28, 2026, 9:45 a.m.
NEDg Description generation batch_69c7a446c5088190908dd7b4cdc57f18 completed March 28, 2026, 9:49 a.m.
NED2 Entity disambiguation (via description) batch_69c7a4fc9f788190b38437c6e91a5f8a completed March 28, 2026, 9:53 a.m.
Created at: March 27, 2026, 2:44 p.m.