Triple

T29946925

Position	Surface form	Disambiguated ID	Type / Status
Subject	BART Richmond–Millbrae+SFO line	`E760656`	entity
Predicate	usesTrack	`P27244`	FINISHED
Object	BART mainline tracks BART mainline tracks are the primary standard-gauge rail corridors that carry most Bay Area Rapid Transit trains across the core of the San Francisco Bay Area system.	`E1892008`	NE FINISHED

How this triple was built (2 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: BART mainline tracks | Statement: [BART Richmond–Millbrae+SFO line, usesTrack, BART mainline tracks]

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: BART mainline tracks
Triple: [BART Richmond–Millbrae+SFO line, usesTrack, BART mainline tracks]

Generated description

BART mainline tracks are the primary standard-gauge rail corridors that carry most Bay Area Rapid Transit trains across the core of the San Francisco Bay Area system.

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_69f2246562b881909d57622f4086d43d`	completed	April 29, 2026, 3:31 p.m.
NER	Named-entity recognition	`batch_69f6780c47b08190adbfa6f39c9be072`	completed	May 2, 2026, 10:17 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a27142ea05881908d55b064ac91802f`	completed	June 8, 2026, 7:12 p.m.
NEDg	Description generation	`batch_6a27151f69408190952d4d3ad9a3fc38`	completed	June 8, 2026, 7:16 p.m.
NED2	Entity disambiguation (via description)	`batch_6a2718ad777081909ac0744b1551af12`	completed	June 8, 2026, 7:31 p.m.

Created at: April 29, 2026, 6:24 p.m.