Triple

T4880675

Position	Surface form	Disambiguated ID	Type / Status
Subject	LaSalle/Van Buren station	`E109315`	entity
Predicate	category	`P87`	FINISHED
Object	Chicago Transit Authority Purple Line stations Chicago Transit Authority Purple Line stations are the rapid transit stops in the Chicago 'L' system served by the Purple Line, which runs between the northern suburbs and downtown Chicago.	`E482612`	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: Chicago Transit Authority Purple Line stations | Statement: [LaSalle/Van Buren station, category, Chicago Transit Authority Purple Line stations]

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

Target entity: Chicago Transit Authority Purple Line stations
Context triple: [LaSalle/Van Buren station, category, Chicago Transit Authority Purple Line stations]

A. Chicago Transit Authority Pink Line stations
Chicago Transit Authority Pink Line stations are the rapid transit stops along the CTA’s Pink Line, serving neighborhoods from the Near West Side of Chicago out to its western terminus.
B. Chicago Transit Authority Green Line stations
Chicago Transit Authority Green Line stations are the train stops served by the Green Line of Chicago’s ‘L’ rapid transit system.
C. Chicago Transit Authority Brown Line stations
Chicago Transit Authority Brown Line stations are the elevated and subway train stops in Chicago that serve the Brown Line route of the city’s “L” rapid transit system.
D. CTA Purple Line
The CTA Purple Line is a rapid transit route in Chicago’s ‘L’ system that primarily serves the northern suburbs and provides express service to downtown during weekday rush hours.
E. 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.
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: Chicago Transit Authority Purple Line stations
Triple: [LaSalle/Van Buren station, category, Chicago Transit Authority Purple Line stations]

Generated description

Chicago Transit Authority Purple Line stations are the rapid transit stops in the Chicago 'L' system served by the Purple Line, which runs between the northern suburbs and downtown Chicago.

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

Target entity: Chicago Transit Authority Purple Line stations
Target entity description: Chicago Transit Authority Purple Line stations are the rapid transit stops in the Chicago 'L' system served by the Purple Line, which runs between the northern suburbs and downtown Chicago.

A. Chicago Transit Authority Pink Line stations
Chicago Transit Authority Pink Line stations are the rapid transit stops along the CTA’s Pink Line, serving neighborhoods from the Near West Side of Chicago out to its western terminus.
B. Chicago Transit Authority Green Line stations
Chicago Transit Authority Green Line stations are the train stops served by the Green Line of Chicago’s ‘L’ rapid transit system.
C. Chicago Transit Authority Brown Line stations
Chicago Transit Authority Brown Line stations are the elevated and subway train stops in Chicago that serve the Brown Line route of the city’s “L” rapid transit system.
D. CTA Purple Line
The CTA Purple Line is a rapid transit route in Chicago’s ‘L’ system that primarily serves the northern suburbs and provides express service to downtown during weekday rush hours.
E. 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.
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_69bd440e9d64819083e82cf33b4d9570`	completed	March 20, 2026, 12:56 p.m.
NER	Named-entity recognition	`batch_69bd6dc071d4819083ea9fd0c73c5f49`	completed	March 20, 2026, 3:54 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69be81b60ea48190ae8cd7ef9c30a388`	completed	March 21, 2026, 11:32 a.m.
NEDg	Description generation	`batch_69be842c58a481909a0bd1d608a59d88`	completed	March 21, 2026, 11:42 a.m.
NED2	Entity disambiguation (via description)	`batch_69be848b0df88190aba28a258d8a706e`	completed	March 21, 2026, 11:44 a.m.

Created at: March 20, 2026, 1:27 p.m.