Triple

T11034103
Position Surface form Disambiguated ID Type / Status
Subject Fern Rock–Olney express segment E260831 entity
Predicate network P2637 FINISHED
Object SEPTA Broad Street Subway E8578 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: SEPTA Broad Street Subway | Statement: [Fern Rock–Olney express segment, network, SEPTA Broad Street Subway]

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: SEPTA Broad Street Subway
Context triple: [Fern Rock–Olney express segment, network, SEPTA Broad Street Subway]
  • A. SEPTA Broad Street Line chosen
    The SEPTA Broad Street Line is a rapid transit subway line running primarily along Broad Street in Philadelphia, providing north–south service through the city’s central corridor.
  • B. SEPTA Market–Frankford Line
    The SEPTA Market–Frankford Line is a major rapid transit route in Philadelphia that runs east–west across the city, connecting key neighborhoods and commercial districts.
  • C. Fairmount Line
    The Fairmount Line is a commuter rail service in the Boston area that connects South Station with neighborhoods in Dorchester, Mattapan, and Hyde Park.
  • D. SEPTA Trenton Line
    The SEPTA Trenton Line is a commuter rail service in the Philadelphia region that connects Center City Philadelphia with Trenton, New Jersey as part of SEPTA's Regional Rail network.
  • E. SEPTA Main Line
    The SEPTA Main Line is a key commuter rail corridor in the Philadelphia region, carrying multiple Regional Rail services through numerous suburban and urban stations.
  • 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_69d6aa979bdc8190bf0e79104cc098c1 elicitation completed
NER batch_69d797e709648190adbb05197e15ff76 ner completed
NED1 batch_69e42d587dd08190ba466a4ffedde1e0 ned_source_triple completed
Created at: April 8, 2026, 9:25 p.m.