Triple

T16194751
Position Surface form Disambiguated ID Type / Status
Subject Union City station E393032 entity
Predicate line P1293 FINISHED
Object BART Richmond–Warm Springs/South Fremont line
The BART Richmond–Warm Springs/South Fremont line is a Bay Area Rapid Transit service route that runs north–south through the San Francisco Bay Area, connecting Richmond in the East Bay to the southern terminus at Warm Springs/South Fremont with multiple stops along the way.
 E423149 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: BART Richmond–Warm Springs/South Fremont line | Statement: [Union City station, line, BART Richmond–Warm Springs/South Fremont line]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: BART Richmond–Warm Springs/South Fremont line
Context triple: [Union City station, line, BART Richmond–Warm Springs/South Fremont line]
  • A. BART Fremont line
    The BART Fremont line is a Bay Area Rapid Transit route in the San Francisco Bay Area that historically extended service to the city of Fremont in southern Alameda County.
  • B. BART Richmond–Millbrae+SFO line
    The BART Richmond–Millbrae+SFO line is a Bay Area Rapid Transit route that runs from Richmond in the East Bay through Oakland and San Francisco to Millbrae and San Francisco International Airport.
  • C. BART Orange Line
    The BART Orange Line is a Bay Area Rapid Transit service route that runs through the East Bay and South Bay, connecting cities such as Richmond, Oakland, and San José.
  • D. BART Yellow Line
    The BART Yellow Line is a Bay Area Rapid Transit route that runs through key stations including Civic Center/UN Plaza, connecting San Francisco with the East Bay and beyond.
  • E. BART Blue Line
    The BART Blue Line is a Bay Area Rapid Transit service route that runs through San Francisco and the greater Bay Area, connecting key urban centers and regional destinations.
  • 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: BART Richmond–Warm Springs/South Fremont line
Triple: [Union City station, line, BART Richmond–Warm Springs/South Fremont line]
Generated description
The BART Richmond–Warm Springs/South Fremont line is a Bay Area Rapid Transit service route that runs north–south through the San Francisco Bay Area, connecting Richmond in the East Bay to the southern terminus at Warm Springs/South Fremont with multiple stops along the way.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07 
Target entity: BART Richmond–Warm Springs/South Fremont line
Target entity description: The BART Richmond–Warm Springs/South Fremont line is a Bay Area Rapid Transit service route that runs north–south through the San Francisco Bay Area, connecting Richmond in the East Bay to the southern terminus at Warm Springs/South Fremont with multiple stops along the way.
  • A. BART Fremont line chosen
    The BART Fremont line is a Bay Area Rapid Transit route in the San Francisco Bay Area that historically extended service to the city of Fremont in southern Alameda County.
  • B. BART Richmond–Millbrae+SFO line
    The BART Richmond–Millbrae+SFO line is a Bay Area Rapid Transit route that runs from Richmond in the East Bay through Oakland and San Francisco to Millbrae and San Francisco International Airport.
  • C. BART Orange Line
    The BART Orange Line is a Bay Area Rapid Transit service route that runs through the East Bay and South Bay, connecting cities such as Richmond, Oakland, and San José.
  • D. BART Yellow Line
    The BART Yellow Line is a Bay Area Rapid Transit route that runs through key stations including Civic Center/UN Plaza, connecting San Francisco with the East Bay and beyond.
  • E. BART Blue Line
    The BART Blue Line is a Bay Area Rapid Transit service route that runs through San Francisco and the greater Bay Area, connecting key urban centers and regional destinations.
  • 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_69d87f1e49ac8190a311b54d32990576 completed April 10, 2026, 4:39 a.m.
NER Named-entity recognition batch_69e222d851188190b2452d165e4fc4bd completed April 17, 2026, 12:08 p.m.
NED1 Entity disambiguation (via context triple) batch_6a000ecf454081909660f4ab9c556ddc completed May 10, 2026, 4:51 a.m.
NEDg Description generation batch_6a000f5471308190a68961b4fbce46aa completed May 10, 2026, 4:53 a.m.
NED2 Entity disambiguation (via description) batch_6a000fae428081909a246f0f8e284541 completed May 10, 2026, 4:55 a.m.
Created at: April 10, 2026, 5:02 a.m.