Triple

T779181

Position	Surface form	Disambiguated ID	Type / Status
Subject	Blue Line (CTA)	`E16457`	entity
Predicate	hasStation	`P35`	FINISHED
Object	Oak Park station (Blue Line) Oak Park station (Blue Line) is an elevated Chicago Transit Authority rapid transit stop in Oak Park, Illinois, serving the Forest Park branch of the Blue Line.	`E101509`	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: Oak Park station (Blue Line) | Statement: [Blue Line (CTA), hasStation, Oak Park station (Blue Line)]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Oak Park station (Blue Line)
Context triple: [Blue Line (CTA), hasStation, Oak Park station (Blue Line)]

A. Illinois Medical District station
Illinois Medical District station is a Chicago Transit Authority rapid transit stop on the Blue Line serving the Illinois Medical District and nearby West Side institutions.
B. 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.
C. Addison station (CTA Red Line)
Addison station (CTA Red Line) is a Chicago 'L' rapid transit stop on the Red Line located in the Lakeview neighborhood, best known for serving fans attending games and events at nearby Wrigley Field.
D. UIC–Halsted station
UIC–Halsted station is a Chicago Transit Authority rapid transit stop on the Blue Line serving the University of Illinois at Chicago campus and the Near West Side neighborhood.
E. Westlake/MacArthur Park station
Westlake/MacArthur Park station is a major Los Angeles Metro Rail subway stop near downtown Los Angeles, serving as a busy transit hub for the surrounding Westlake and MacArthur Park neighborhoods.
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: Oak Park station (Blue Line)
Triple: [Blue Line (CTA), hasStation, Oak Park station (Blue Line)]

Generated description

Oak Park station (Blue Line) is an elevated Chicago Transit Authority rapid transit stop in Oak Park, Illinois, serving the Forest Park branch of the Blue Line.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Oak Park station (Blue Line)
Target entity description: Oak Park station (Blue Line) is an elevated Chicago Transit Authority rapid transit stop in Oak Park, Illinois, serving the Forest Park branch of the Blue Line.

A. Illinois Medical District station
Illinois Medical District station is a Chicago Transit Authority rapid transit stop on the Blue Line serving the Illinois Medical District and nearby West Side institutions.
B. 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.
C. Addison station (CTA Red Line)
Addison station (CTA Red Line) is a Chicago 'L' rapid transit stop on the Red Line located in the Lakeview neighborhood, best known for serving fans attending games and events at nearby Wrigley Field.
D. UIC–Halsted station
UIC–Halsted station is a Chicago Transit Authority rapid transit stop on the Blue Line serving the University of Illinois at Chicago campus and the Near West Side neighborhood.
E. Westlake/MacArthur Park station
Westlake/MacArthur Park station is a major Los Angeles Metro Rail subway stop near downtown Los Angeles, serving as a busy transit hub for the surrounding Westlake and MacArthur Park neighborhoods.
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_69a4936ad1fc81908f190208059ccf78`	completed	March 1, 2026, 7:28 p.m.
NER	Named-entity recognition	`batch_69a4a74f886081909c27b786e3adbe32`	completed	March 1, 2026, 8:53 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69a7a3adf1d88190acec593f0aca1ec0`	completed	March 4, 2026, 3:14 a.m.
NEDg	Description generation	`batch_69a7a5aeb480819081fc1bebc67f8341`	completed	March 4, 2026, 3:23 a.m.
NED2	Entity disambiguation (via description)	`batch_69a7a63d9ca88190b9389a80283f8356`	completed	March 4, 2026, 3:25 a.m.

Created at: March 1, 2026, 7:37 p.m.