Triple

T12059975
Position Surface form Disambiguated ID Type / Status
Subject Baltimore rail network E287140 entity
Predicate includesLine P2124 FINISHED
Object CSX Old Main Line Subdivision E430951 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: CSX Old Main Line Subdivision | Statement: [Baltimore rail network, includesLine, CSX Old Main Line Subdivision]

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: CSX Old Main Line Subdivision
Context triple: [Baltimore rail network, includesLine, CSX Old Main Line Subdivision]
  • A. CSX Old Main Line Subdivision chosen
    The CSX Old Main Line Subdivision is a historic freight rail line in Maryland that traces much of the original route of the Baltimore and Ohio Railroad, one of the oldest railroads in the United States.
  • B. CSX RF&P Subdivision
    The CSX RF&P Subdivision is a major CSX Transportation rail line in Virginia that forms part of the busy freight and passenger corridor linking Washington, D.C. with Richmond and points south.
  • C. CSX Capital Subdivision
    CSX Capital Subdivision is a CSX Transportation rail line in Maryland that serves as a key freight and commuter corridor between Washington, D.C., and Baltimore.
  • D. CSX Bellwood Subdivision
    The CSX Bellwood Subdivision is a freight rail line in Virginia operated by CSX Transportation, forming part of the company’s network around the Richmond area.
  • E. CSX Transportation Cumberland Subdivision
    CSX Transportation's Cumberland Subdivision is a major freight rail line running through Maryland and West Virginia that also hosts MARC commuter rail service on the Brunswick Line.
  • 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_69d6ab4780948190bdb9f7620c2ac27e elicitation completed
NER batch_69d9043dbccc8190bf9da181f826f0d8 ner completed
NED1 batch_69f61e3ee53c81909c2e4620a12a46da ned_source_triple completed
Created at: April 8, 2026, 9:47 p.m.