Triple

T18170615
Position Surface form Disambiguated ID Type / Status
Subject Racine station E435014 entity
Predicate servedBy P82 FINISHED
Object Forest Park branch of the Blue Line — 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: Forest Park branch of the Blue Line | Statement: [Racine station, servedBy, Forest Park branch of the Blue Line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: Forest Park branch of the Blue Line
Context triple: [Racine station, servedBy, Forest Park branch of the Blue Line]
  • A. Forest Park branch of the Blue Line chosen
    The Forest Park branch of the Blue Line is a western segment of Chicago’s rapid transit system that runs between downtown and the suburb of Forest Park.
  • B. Ravenswood branch (Brown Line)
    The Ravenswood branch of Chicago's Brown Line is an elevated rapid transit route on the city's North Side, serving neighborhoods such as Lincoln Park, Lakeview, and Ravenswood and connecting them to the Loop.
  • C. Cermak Branch of Pink Line
    The Cermak Branch of the Pink Line is a rapid transit route on Chicago’s 'L' system that runs through the city’s West Side and Lower West Side neighborhoods, connecting them to the Loop.
  • D. O'Hare branch of the Blue Line
    The O'Hare branch of the Blue Line is the Chicago 'L' rapid transit segment that runs northwest from downtown Chicago to O'Hare International Airport.
  • E. Metra at Forest Park
    Metra at Forest Park is a commuter rail station in Forest Park, Illinois, serving Metra’s Union Pacific West Line and providing regional rail connections to and from Chicago.
  • 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_69d8b90b7a188190b3fc7b8d4a6cd20a completed April 10, 2026, 8:47 a.m.
NER Named-entity recognition batch_69e4df555af081908a2f12bce6a13f56 completed April 19, 2026, 1:57 p.m.
Created at: April 10, 2026, 10:30 a.m.