Triple

T8298846
Position Surface form Disambiguated ID Type / Status
Subject East Oakland E194293 entity
Predicate traversedBy P225 FINISHED
Object BART Richmond–Fremont line E423149 NE FINISHED

Named-entity recognition

Before disambiguation, gpt-5-mini classified whether the object phrase is a named entity — the step behind the object's NE type shown above.

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–Fremont line | Statement: [East Oakland, traversedBy, BART Richmond–Fremont line]

Disambiguation candidates (1 decision)

The exact options the model was shown at each disambiguation step, with the option it chose highlighted — the evidence behind this triple's disambiguated ids.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07 
Target entity: BART Richmond–Fremont line
Context triple: [East Oakland, traversedBy, BART Richmond–Fremont line]
  • 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 Antioch–SFO+Millbrae line
    The BART Antioch–SFO+Millbrae line is a Bay Area Rapid Transit service that runs between Antioch in the East Bay and San Francisco International Airport and Millbrae, connecting suburban communities with major regional transit hubs.
  • 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 Red Line
    The BART Red Line is a Bay Area Rapid Transit service route that runs through San Francisco and connects key destinations including downtown San Francisco, Oakland, and other parts of the Bay Area.
  • 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.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (3 batches)

Stage Batch ID Job type Status
creating batch_69ca82e50ebc81909aa7b260c76bd757 elicitation completed
NER batch_69cb7dfb60e48190bfa5de1c1496d3b5 ner completed
NED1 batch_69cd68b6ad30819090d34d8e79cee634 ned_source_triple completed
Created at: March 30, 2026, 5:53 p.m.