Triple

T4433224

Position	Surface form	Disambiguated ID	Type / Status
Subject	Washington/Wabash station	`E95382`	entity
Predicate	category	`P87`	FINISHED
Object	Chicago Transit Authority Purple Line stations Chicago Transit Authority Purple Line stations are the rapid transit stops in Chicago served by the CTA’s Purple Line, which runs between Linden in Wilmette and the Loop, including during weekday express service.	`E382139`	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: [Washington/Wabash 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: [Washington/Wabash 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. 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.
C. Chicago Transit Authority
The Chicago Transit Authority is the primary public transportation agency serving Chicago and several surrounding suburbs, operating the city’s extensive network of buses and rapid transit trains.
D. Purple Line (CTA)
The Purple Line (CTA) is a rapid transit route in Chicago primarily serving the northern suburbs and Evanston, with express service to downtown during weekday rush hours.
E. CTA Pink Line
The CTA Pink Line is a rapid transit route in Chicago's 'L' system that connects the city's West Side neighborhoods with the downtown Loop.
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: [Washington/Wabash station, category, Chicago Transit Authority Purple Line stations]

Generated description

Chicago Transit Authority Purple Line stations are the rapid transit stops in Chicago served by the CTA’s Purple Line, which runs between Linden in Wilmette and the Loop, including during weekday express service.

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 Chicago served by the CTA’s Purple Line, which runs between Linden in Wilmette and the Loop, including during weekday express service.

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. CTA Purple Line chosen
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.
C. Chicago Transit Authority
The Chicago Transit Authority is the primary public transportation agency serving Chicago and several surrounding suburbs, operating the city’s extensive network of buses and rapid transit trains.
D. Purple Line (CTA)
The Purple Line (CTA) is a rapid transit route in Chicago primarily serving the northern suburbs and Evanston, with express service to downtown during weekday rush hours.
E. CTA Pink Line
The CTA Pink Line is a rapid transit route in Chicago's 'L' system that connects the city's West Side neighborhoods with the downtown Loop.
F. None of above.

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_69b3453c2a0c8190926b574c90766db9`	completed	March 12, 2026, 10:59 p.m.
NER	Named-entity recognition	`batch_69b35587bc048190aee8e0ed94b6e064`	completed	March 13, 2026, 12:08 a.m.
NED1	Entity disambiguation (via context triple)	`batch_69b6137171148190b77a6f783d5cf315`	completed	March 15, 2026, 2:03 a.m.
NEDg	Description generation	`batch_69b6177d1a588190991fddf506239d22`	completed	March 15, 2026, 2:20 a.m.
NED2	Entity disambiguation (via description)	`batch_69b61b6bc1448190b30d444a821bb1a5`	completed	March 15, 2026, 2:37 a.m.

Created at: March 12, 2026, 11:31 p.m.