Triple

T458811
Position Surface form Disambiguated ID Type / Status
Subject Altamont Corridor Express E7290 entity
Predicate operator P179 FINISHED
Object San Joaquin Regional Rail Commission
The San Joaquin Regional Rail Commission is a public agency in California responsible for planning, managing, and overseeing regional passenger rail services in the San Joaquin Valley and surrounding areas.
 E59414 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: San Joaquin Regional Rail Commission | Statement: [Altamont Corridor Express, operator, San Joaquin Regional Rail Commission]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: San Joaquin Regional Rail Commission
Context triple: [Altamont Corridor Express, operator, San Joaquin Regional Rail Commission]
  • A. Sacramento Southern Railroad
    The Sacramento Southern Railroad is a heritage railway in Sacramento, California, offering excursion train rides along the Sacramento River as part of the California State Railroad Museum’s operations.
  • 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. Peninsula Corridor Joint Powers Board
    The Peninsula Corridor Joint Powers Board is a public agency formed by Bay Area counties to oversee and manage the Caltrain commuter rail service along the San Francisco Peninsula.
  • D. San Mateo County Transit District
    San Mateo County Transit District is the public agency that oversees and manages bus and other transit services in San Mateo County, California.
  • E. San Francisco Muni
    San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
  • 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: San Joaquin Regional Rail Commission
Triple: [Altamont Corridor Express, operator, San Joaquin Regional Rail Commission]
Generated description
The San Joaquin Regional Rail Commission is a public agency in California responsible for planning, managing, and overseeing regional passenger rail services in the San Joaquin Valley and surrounding areas.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: San Joaquin Regional Rail Commission
Target entity description: The San Joaquin Regional Rail Commission is a public agency in California responsible for planning, managing, and overseeing regional passenger rail services in the San Joaquin Valley and surrounding areas.
  • A. Sacramento Southern Railroad
    The Sacramento Southern Railroad is a heritage railway in Sacramento, California, offering excursion train rides along the Sacramento River as part of the California State Railroad Museum’s operations.
  • 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. Peninsula Corridor Joint Powers Board
    The Peninsula Corridor Joint Powers Board is a public agency formed by Bay Area counties to oversee and manage the Caltrain commuter rail service along the San Francisco Peninsula.
  • D. San Mateo County Transit District
    San Mateo County Transit District is the public agency that oversees and manages bus and other transit services in San Mateo County, California.
  • E. San Francisco Muni
    San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
  • 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_69a2e7e5c5bc8190a1dc8178218fba40 completed Feb. 28, 2026, 1:04 p.m.
NER Named-entity recognition batch_69a2efa4a6208190a8243a0e14f84f52 completed Feb. 28, 2026, 1:37 p.m.
NED1 Entity disambiguation (via context triple) batch_69a467fd7cc48190b00982c4f1c41eaf completed March 1, 2026, 4:23 p.m.
NEDg Description generation batch_69a4688a2cbc8190a2110fcd32b63f19 completed March 1, 2026, 4:25 p.m.
NED2 Entity disambiguation (via description) batch_69a468dfc120819098e9f66c8193a20f completed March 1, 2026, 4:27 p.m.
Created at: Feb. 28, 2026, 1:12 p.m.