Triple

T23062199
Position Surface form Disambiguated ID Type / Status
Subject Vanderbilt railroad system E574934 entity
Predicate includes P1393 FINISHED
Object Michigan Central Railroad — NE NERFINISHED

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: Michigan Central Railroad | Statement: [Vanderbilt railroad system, includes, Michigan Central Railroad]

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: Michigan Central Railroad
Context triple: [Vanderbilt railroad system, includes, Michigan Central Railroad]
  • A. Michigan Central Railroad chosen
    Michigan Central Railroad was a major 19th- and early 20th-century American railroad company that operated key passenger and freight routes across Michigan and the Great Lakes region, connecting to Chicago and the broader Midwest rail network.
  • B. Great Lakes Central Railroad
    Great Lakes Central Railroad is a regional freight railroad in Michigan that operates former state-owned lines across the central and northern parts of the state.
  • C. Pere Marquette Railway
    Pere Marquette Railway was a historic Midwestern U.S. railroad company that operated primarily in Michigan and surrounding states in the late 19th and early 20th centuries.
  • D. Detroit, Toledo and Ironton Railroad
    The Detroit, Toledo and Ironton Railroad was a regional U.S. railroad operating primarily in Michigan and Ohio, known for its freight services and later incorporation into larger rail systems.
  • E. Belt Railway of Chicago
    The Belt Railway of Chicago is a major terminal railroad that provides switching and interchange services among multiple freight railroads in the Chicago area.
  • F. None of above.
  • G. Unsure - the case is ambiguous/there is not enough information to decide.

Provenance (2 batches)

Stage Batch ID Job type Status
creating batch_69e245bd6e4c8190bb8942245b68cad5 elicitation completed
NER batch_69f189a0c3c881909f137ad511c216ac ner completed
Created at: April 17, 2026, 3:55 p.m.