Triple

T1088818

Position	Surface form	Disambiguated ID	Type / Status
Subject	Alameda Corridor	`E24113`	entity
Predicate	operator	`P179`	FINISHED
Object	Alameda Corridor Transportation Authority The Alameda Corridor Transportation Authority is a public agency responsible for overseeing and managing the freight rail expressway that links the ports of Los Angeles and Long Beach to the national rail network.	`E24113`	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: Alameda Corridor Transportation Authority | Statement: [Alameda Corridor, operator, Alameda Corridor Transportation Authority]

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

Target entity: Alameda Corridor Transportation Authority
Context triple: [Alameda Corridor, operator, Alameda Corridor Transportation Authority]

A. Los Angeles County Metropolitan Transportation Authority
The Los Angeles County Metropolitan Transportation Authority is the primary public transit agency for Los Angeles County, operating and overseeing the region’s bus and rail systems.
B. Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
C. Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
D. Alameda Corridor
The Alameda Corridor is a 20-mile freight rail expressway in Los Angeles County that consolidates and streamlines cargo movement between the region’s ports and the national rail network.
E. Los Angeles Department of Transportation
The Los Angeles Department of Transportation is the city agency responsible for managing and regulating transportation systems, traffic operations, and mobility services within Los Angeles.
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: Alameda Corridor Transportation Authority
Triple: [Alameda Corridor, operator, Alameda Corridor Transportation Authority]

Generated description

The Alameda Corridor Transportation Authority is a public agency responsible for overseeing and managing the freight rail expressway that links the ports of Los Angeles and Long Beach to the national rail network.

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

Target entity: Alameda Corridor Transportation Authority
Target entity description: The Alameda Corridor Transportation Authority is a public agency responsible for overseeing and managing the freight rail expressway that links the ports of Los Angeles and Long Beach to the national rail network.

A. Los Angeles County Metropolitan Transportation Authority
The Los Angeles County Metropolitan Transportation Authority is the primary public transit agency for Los Angeles County, operating and overseeing the region’s bus and rail systems.
B. Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
C. Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
D. Alameda Corridor chosen
The Alameda Corridor is a 20-mile freight rail expressway in Los Angeles County that consolidates and streamlines cargo movement between the region’s ports and the national rail network.
E. Los Angeles Department of Transportation
The Los Angeles Department of Transportation is the city agency responsible for managing and regulating transportation systems, traffic operations, and mobility services within Los Angeles.
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_69a49404428c819092dcc9632f5f7b8b`	completed	March 1, 2026, 7:31 p.m.
NER	Named-entity recognition	`batch_69a4b97d85708190a1630256648aa4a2`	completed	March 1, 2026, 10:11 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69ac599e543c8190bbb0558379d8d9d5`	completed	March 7, 2026, 5 p.m.
NEDg	Description generation	`batch_69ac5a1fd5448190a72354c1017dfcf4`	completed	March 7, 2026, 5:02 p.m.
NED2	Entity disambiguation (via description)	`batch_69ac5a76e99c8190be49b80e31088693`	completed	March 7, 2026, 5:03 p.m.

Created at: March 1, 2026, 7:42 p.m.