Triple

T12304688
Position Surface form Disambiguated ID Type / Status
Subject Washington Park neighborhood E293322 entity
Predicate hasLandmark P105 FINISHED
Object 55th–56th–57th Street Metra station
The 55th–56th–57th Street Metra station is a major commuter rail stop on Chicago’s South Side serving the Hyde Park and Washington Park areas, including the University of Chicago campus.
 E975669 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: 55th–56th–57th Street Metra station | Statement: [Washington Park neighborhood, hasLandmark, 55th–56th–57th Street Metra station]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: 55th–56th–57th Street Metra station
Context triple: [Washington Park neighborhood, hasLandmark, 55th–56th–57th Street Metra station]
  • A. 86th Street station
    86th Street station is a New York City Subway station on the Second Avenue Line in Manhattan, notable for its modern design and prominent public art installations.
  • B. 111th Street–Morgan Park station
    111th Street–Morgan Park station is a Metra commuter rail stop on the Rock Island District line serving Chicago’s Beverly and Morgan Park neighborhoods.
  • C. Metra Rock Island District 35th Street station
    Metra Rock Island District 35th Street station is a commuter rail stop in Chicago serving the Rock Island District line, located near Guaranteed Rate Field and providing access to the surrounding Bronzeville and Bridgeport areas.
  • D. 54th/Cermak station
    54th/Cermak station is a Chicago 'L' rapid transit stop in Cicero, Illinois, serving as the western terminal of the CTA Pink Line.
  • E. Blue Island–Vermont Street station
    Blue Island–Vermont Street station is a Metra commuter rail station in Blue Island, Illinois, serving as a key stop on Chicago-area rail lines.
  • 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: 55th–56th–57th Street Metra station
Triple: [Washington Park neighborhood, hasLandmark, 55th–56th–57th Street Metra station]
Generated description
The 55th–56th–57th Street Metra station is a major commuter rail stop on Chicago’s South Side serving the Hyde Park and Washington Park areas, including the University of Chicago campus.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: 55th–56th–57th Street Metra station
Target entity description: The 55th–56th–57th Street Metra station is a major commuter rail stop on Chicago’s South Side serving the Hyde Park and Washington Park areas, including the University of Chicago campus.
  • A. 86th Street station
    86th Street station is a New York City Subway station on the Second Avenue Line in Manhattan, notable for its modern design and prominent public art installations.
  • B. 111th Street–Morgan Park station
    111th Street–Morgan Park station is a Metra commuter rail stop on the Rock Island District line serving Chicago’s Beverly and Morgan Park neighborhoods.
  • C. Metra Rock Island District 35th Street station
    Metra Rock Island District 35th Street station is a commuter rail stop in Chicago serving the Rock Island District line, located near Guaranteed Rate Field and providing access to the surrounding Bronzeville and Bridgeport areas.
  • D. 54th/Cermak station
    54th/Cermak station is a Chicago 'L' rapid transit stop in Cicero, Illinois, serving as the western terminal of the CTA Pink Line.
  • E. Blue Island–Vermont Street station
    Blue Island–Vermont Street station is a Metra commuter rail station in Blue Island, Illinois, serving as a key stop on Chicago-area rail lines.
  • 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_69d6ab6a2b50819082f6aedd32ed608a completed April 8, 2026, 7:24 p.m.
NER Named-entity recognition batch_69d93edca2648190987eef19599e340c completed April 10, 2026, 6:18 p.m.
NED1 Entity disambiguation (via context triple) batch_69f61e7f8fd08190bdef3bb761d53f97 completed May 2, 2026, 3:55 p.m.
NEDg Description generation batch_69f61f5cc5608190a67a888eb5136ada completed May 2, 2026, 3:59 p.m.
NED2 Entity disambiguation (via description) batch_69f62009766c8190985fafe9ba53ae7b completed May 2, 2026, 4:02 p.m.
Created at: April 8, 2026, 9:53 p.m.