Triple

T36352274

Position	Surface form	Disambiguated ID	Type / Status
Subject	San Francisco Caltrain Station	`E895236`	entity
Predicate	previousTerminusReplaced	`P63485`	FINISHED
Object	4th and Townsend Street station 4th and Townsend Street station was a former San Francisco rail terminal that historically served as the city’s main passenger train station before being replaced by the current San Francisco Caltrain Station.	`E2180701`	NE FINISHED

How this triple was built (3 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: 4th and Townsend Street station | Statement: [San Francisco Caltrain Station, previousTerminusReplaced, 4th and Townsend Street station]

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: 4th and Townsend Street station
Triple: [San Francisco Caltrain Station, previousTerminusReplaced, 4th and Townsend Street station]

Generated description

4th and Townsend Street station was a former San Francisco rail terminal that historically served as the city’s main passenger train station before being replaced by the current San Francisco Caltrain Station.

PD Predicate disambiguation gpt-5-mini-2025-08-07

Target predicate: previousTerminusReplaced
Context triple: [San Francisco Caltrain Station, previousTerminusReplaced, 4th and Townsend Street station]

A. formerTerminusFor
Indicates that a location once served as the endpoint or final stop of a route, line, or service, but no longer holds that status.
B. previousLocationReplaced
Indicates that one location has been superseded or taken over by another location, replacing its previous role or position.
C. alternativeTerminus
Indicates that something serves as another possible endpoint or final destination in place of, or in addition to, a primary terminus.
D. successorTerminus chosen
Indicates that one terminus directly follows another in a defined sequence or progression.
E. successorStateReplacedBy
Indicates that a given state in a sequence or process has been replaced by a new successor state, which now takes its place in the progression.
F. None of above.

Provenance (6 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_69f76e4f437c8190a1af3ea2564f41f5`	completed	May 3, 2026, 3:48 p.m.
NER	Named-entity recognition	`batch_69ff9361943c81909544203cbc998a69`	completed	May 9, 2026, 8:04 p.m.
NED1	Entity disambiguation (via context triple)	`batch_6a39a329e2488190b39d42dd7112a793`	completed	June 22, 2026, 9:03 p.m.
NEDg	Description generation	`batch_6a39a4608b3481909ecc1119384ef337`	completed	June 22, 2026, 9:08 p.m.
NED2	Entity disambiguation (via description)	`batch_6a39a599bce88190950bc55a2e74ea29`	completed	June 22, 2026, 9:14 p.m.
PD	Predicate disambiguation	`batch_69ff913138a08190b59bdc9d8d199eb3`	completed	May 9, 2026, 7:55 p.m.

Created at: May 3, 2026, 4:09 p.m.