Triple

T7126798

Position	Surface form	Disambiguated ID	Type / Status
Subject	Belmont station (CTA North Side)	`E166082`	entity
Predicate	isKeyNodeIn	`P20548`	FINISHED
Object	North Side trunk of CTA rail network The North Side trunk of the CTA rail network is a major shared corridor in Chicago’s ‘L’ system where multiple north side lines converge and run together through densely traveled areas before branching to their respective terminals.	`E643645`	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: North Side trunk of CTA rail network | Statement: [Belmont station (CTA North Side), isKeyNodeIn, North Side trunk of CTA rail network]

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

Target entity: North Side trunk of CTA rail network
Context triple: [Belmont station (CTA North Side), isKeyNodeIn, North Side trunk of CTA rail network]

A. South Side elevated lines of Chicago
The South Side elevated lines of Chicago are a historic segment of the city’s rapid transit system serving Chicago’s South Side neighborhoods as part of the “L” network.
B. Central station (CTA Purple Line)
Central station is a Chicago Transit Authority 'L' rapid transit stop on the Purple Line located in Evanston, Illinois.
C. South Side Elevated branch
The South Side Elevated branch is a historic segment of Chicago's rapid transit system that serves the city's South Side as part of the Chicago "L" network.
D. Midway station (CTA)
Midway station (CTA) is the Chicago Transit Authority rapid transit terminal serving Midway International Airport on the Orange Line.
E. MAX Red Line light rail
The MAX Red Line light rail is a public transit service in the Portland metropolitan area that connects downtown Portland with Portland International Airport and other key destinations.
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: North Side trunk of CTA rail network
Triple: [Belmont station (CTA North Side), isKeyNodeIn, North Side trunk of CTA rail network]

Generated description

The North Side trunk of the CTA rail network is a major shared corridor in Chicago’s ‘L’ system where multiple north side lines converge and run together through densely traveled areas before branching to their respective terminals.

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

Target entity: North Side trunk of CTA rail network
Target entity description: The North Side trunk of the CTA rail network is a major shared corridor in Chicago’s ‘L’ system where multiple north side lines converge and run together through densely traveled areas before branching to their respective terminals.

A. South Side elevated lines of Chicago
The South Side elevated lines of Chicago are a historic segment of the city’s rapid transit system serving Chicago’s South Side neighborhoods as part of the “L” network.
B. Central station (CTA Purple Line)
Central station is a Chicago Transit Authority 'L' rapid transit stop on the Purple Line located in Evanston, Illinois.
C. South Side Elevated branch
The South Side Elevated branch is a historic segment of Chicago's rapid transit system that serves the city's South Side as part of the Chicago "L" network.
D. Midway station (CTA)
Midway station (CTA) is the Chicago Transit Authority rapid transit terminal serving Midway International Airport on the Orange Line.
E. MAX Red Line light rail
The MAX Red Line light rail is a public transit service in the Portland metropolitan area that connects downtown Portland with Portland International Airport and other key destinations.
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_69c6888350588190870cd552b427a1cd`	completed	March 27, 2026, 1:39 p.m.
NER	Named-entity recognition	`batch_69c6e64ee8ac81909ee1c7cb1db3af33`	completed	March 27, 2026, 8:19 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69c7a3357e548190bb56c31843c69f95`	completed	March 28, 2026, 9:45 a.m.
NEDg	Description generation	`batch_69c7a446c5088190908dd7b4cdc57f18`	completed	March 28, 2026, 9:49 a.m.
NED2	Entity disambiguation (via description)	`batch_69c7a4fc9f788190b38437c6e91a5f8a`	completed	March 28, 2026, 9:53 a.m.

Created at: March 27, 2026, 2:44 p.m.