Triple

T3610896

Position	Surface form	Disambiguated ID	Type / Status
Subject	San Dimas, California	`E76482`	entity
Predicate	hasTransportation	`P105`	FINISHED
Object	Metrolink San Dimas station (planned/under construction) Metrolink San Dimas station (planned/under construction) is a future commuter rail stop intended to serve the city of San Dimas, California, as part of the Metrolink regional rail network.	`E373998`	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: Metrolink San Dimas station (planned/under construction) | Statement: [San Dimas, California, hasTransportation, Metrolink San Dimas station (planned/under construction)]

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

Target entity: Metrolink San Dimas station (planned/under construction)
Context triple: [San Dimas, California, hasTransportation, Metrolink San Dimas station (planned/under construction)]

A. Metrolink at Union Station
Metrolink at Union Station is the Southern California regional commuter rail service hub located at Los Angeles Union Station, providing connections between multiple counties and local transit lines.
B. Metrolink San Bernardino Line Fontana station
Metrolink San Bernardino Line Fontana station is a commuter rail stop in Fontana, California, providing regional rail service between the Inland Empire and Los Angeles.
C. Metro L Line (under construction or reconfiguration)
The Metro L Line is a light rail line in Los Angeles County’s Metro Rail system that is currently being reconfigured as part of a broader network restructuring and expansion.
D. San Bernardino–Downtown station
San Bernardino–Downtown station is a commuter rail and transit hub in downtown San Bernardino, California, serving Metrolink trains and local bus connections.
E. Metro Expo Park/USC station
Metro Expo Park/USC station is a Los Angeles Metro Rail station on the E Line that serves the University of Southern California and the Exposition Park museum and sports complex.
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: Metrolink San Dimas station (planned/under construction)
Triple: [San Dimas, California, hasTransportation, Metrolink San Dimas station (planned/under construction)]

Generated description

Metrolink San Dimas station (planned/under construction) is a future commuter rail stop intended to serve the city of San Dimas, California, as part of the Metrolink regional rail network.

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

Target entity: Metrolink San Dimas station (planned/under construction)
Target entity description: Metrolink San Dimas station (planned/under construction) is a future commuter rail stop intended to serve the city of San Dimas, California, as part of the Metrolink regional rail network.

A. Metrolink at Union Station
Metrolink at Union Station is the Southern California regional commuter rail service hub located at Los Angeles Union Station, providing connections between multiple counties and local transit lines.
B. Metrolink San Bernardino Line Fontana station
Metrolink San Bernardino Line Fontana station is a commuter rail stop in Fontana, California, providing regional rail service between the Inland Empire and Los Angeles.
C. Metro L Line (under construction or reconfiguration)
The Metro L Line is a light rail line in Los Angeles County’s Metro Rail system that is currently being reconfigured as part of a broader network restructuring and expansion.
D. San Bernardino–Downtown station
San Bernardino–Downtown station is a commuter rail and transit hub in downtown San Bernardino, California, serving Metrolink trains and local bus connections.
E. Metro Expo Park/USC station
Metro Expo Park/USC station is a Los Angeles Metro Rail station on the E Line that serves the University of Southern California and the Exposition Park museum and sports complex.
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_69ad85da0ba481908b3b48c69efe2b98`	completed	March 8, 2026, 2:21 p.m.
NER	Named-entity recognition	`batch_69adc22cac3c8190bc5f7c45d31668c1`	completed	March 8, 2026, 6:38 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69b433102b1c8190bf2b872c227d041a`	completed	March 13, 2026, 3:53 p.m.
NEDg	Description generation	`batch_69b4384038008190a78fb2d0c15d96b3`	completed	March 13, 2026, 4:16 p.m.
NED2	Entity disambiguation (via description)	`batch_69b438bfdd088190ba37624fb88a0a0b`	completed	March 13, 2026, 4:18 p.m.

Created at: March 8, 2026, 3:23 p.m.