Triple

T23119247
Position Surface form Disambiguated ID Type / Status
Subject Hamilton McKown Twombly E576843 entity
Predicate boardMemberOf P10 FINISHED
Object Chicago and Northwestern 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: Chicago and Northwestern Railroad | Statement: [Hamilton McKown Twombly, boardMemberOf, Chicago and Northwestern 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: Chicago and Northwestern Railroad
Context triple: [Hamilton McKown Twombly, boardMemberOf, Chicago and Northwestern Railroad]
  • A. Chicago and Great Western Railroad
    The Chicago and Great Western Railroad was a 19th-century American railway company that operated lines in the Midwest, contributing to regional transportation and commerce.
  • B. Chicago, Burlington and Quincy Railroad
    The Chicago, Burlington and Quincy Railroad was a major American railroad company in the Midwestern and Western United States, known for its extensive passenger and freight services and its role in developing routes between Chicago, Denver, and the Pacific Coast.
  • C. Chicago and North Western Railway Company chosen
    The Chicago and North Western Railway Company was a major Midwestern American railroad that operated an extensive network of lines connecting Chicago with the upper Midwest and Great Plains from the 19th through the 20th century.
  • D. Chicago and Erie Railroad
    The Chicago and Erie Railroad was a regional American railroad that connected Chicago with points in Indiana and Ohio, serving as an important Midwestern freight and passenger route in the late 19th and early 20th centuries.
  • E. Chicago, Rock Island and Pacific Railroad
    The Chicago, Rock Island and Pacific Railroad was a major Midwestern U.S. railroad that operated extensive passenger and freight services, notably connecting Chicago with cities across the Great Plains and Southwest, until its final liquidation in the 1980s.
  • 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_69e245f6c2e881909a228fdcfeb7c7d3 elicitation completed
NER batch_69f18e4ece5481908d05b4b1e6a07db3 ner completed
Created at: April 17, 2026, 3:59 p.m.