Triple

T21372164
Position Surface form Disambiguated ID Type / Status
Subject Samuel S. Montague E527092 entity
Predicate notableEmployer P20563 FINISHED
Object Central Pacific 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: Central Pacific Railroad | Statement: [Samuel S. Montague, notableEmployer, Central Pacific 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: Central Pacific Railroad
Context triple: [Samuel S. Montague, notableEmployer, Central Pacific Railroad]
  • A. Central Pacific Railroad chosen
    The Central Pacific Railroad was a major 19th-century American railroad company that built the western portion of the First Transcontinental Railroad, linking California to the eastern United States and transforming transportation and commerce.
  • B. Oregon and California Railroad
    The Oregon and California Railroad was a 19th-century rail line in the Pacific Northwest that played a key role in connecting Oregon communities and facilitating regional development.
  • C. San Francisco and North Pacific Railroad
    The San Francisco and North Pacific Railroad was a 19th-century regional railroad in Northern California that later became a key predecessor of the Northwestern Pacific Railroad.
  • D. Southern Pacific Railroad
    Southern Pacific Railroad was a major American railroad company that operated extensive rail networks across the western and southwestern United States from the 19th to the late 20th century.
  • E. Pacific Railroad
    Pacific Railroad was an early American railway company that became the predecessor of the Missouri Pacific Railroad (MoPac), helping to pioneer rail transportation in the central United States.
  • 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_69e0b51e80808190ba5cb05667af02a9 elicitation completed
NER batch_69e8b0b0d5ec81908da8f38380dbdc7a ner completed
Created at: April 16, 2026, 5:10 p.m.