Triple

T398991
Position Surface form Disambiguated ID Type / Status
Subject Federal Steel Company E9236 entity
Predicate hasSubsidiary P254 FINISHED
Object Duluth Iron Range Railway Company
Duluth Iron Range Railway Company was a regional railroad line in Minnesota’s Iron Range that transported iron ore and related freight, historically tied to major industrial interests like Federal Steel.
E50942 NE FINISHED

How this triple was built (4 steps)

Every LLM step that produced this triple, in pipeline order — named-entity classification, the disambiguation choices (the exact options shown, with the pick highlighted), and the generated description. The batch + timestamp of each is in the Provenance table below.

NER Named-entity recognition gpt-5-mini
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: Duluth Iron Range Railway Company | Statement: [Federal Steel Company, hasSubsidiary, Duluth Iron Range Railway Company]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Duluth Iron Range Railway Company
Context triple: [Federal Steel Company, hasSubsidiary, Duluth Iron Range Railway Company]
  • A. Minnesota Iron Company
    Minnesota Iron Company was a major iron mining and ore production firm in Minnesota that operated as a subsidiary within the larger U.S. steel industry.
  • B. Chicago Railways Company
    The Chicago Railways Company was a major early 20th-century street railway operator in Chicago that formed a key part of the city’s urban transit system before consolidation into unified public transportation.
  • C. Missouri Pacific Railroad
    Missouri Pacific Railroad was a major American Class I railroad that operated across the Midwestern and Southwestern United States, playing a key role in regional freight and passenger transportation before its merger into the Union Pacific system.
  • D. Calumet and South Chicago Railway Company
    The Calumet and South Chicago Railway Company was a street railway operator that provided transit services in Chicago’s South Side and surrounding industrial areas in the early 20th century.
  • E. Northern Central Railway
    Northern Central Railway was a historic American railroad that operated primarily in Pennsylvania and Maryland, serving as an important north–south link in the 19th and early 20th centuries.
  • F. None of above. chosen
  • G. Unsure - the case is ambiguous/there is not enough information to decide.
NEDg Description generation gpt-5.1
Instruction
Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"
Input
Entity: Duluth Iron Range Railway Company
Triple: [Federal Steel Company, hasSubsidiary, Duluth Iron Range Railway Company]
Generated description
Duluth Iron Range Railway Company was a regional railroad line in Minnesota’s Iron Range that transported iron ore and related freight, historically tied to major industrial interests like Federal Steel.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Duluth Iron Range Railway Company
Target entity description: Duluth Iron Range Railway Company was a regional railroad line in Minnesota’s Iron Range that transported iron ore and related freight, historically tied to major industrial interests like Federal Steel.
  • A. Minnesota Iron Company
    Minnesota Iron Company was a major iron mining and ore production firm in Minnesota that operated as a subsidiary within the larger U.S. steel industry.
  • B. Chicago Railways Company
    The Chicago Railways Company was a major early 20th-century street railway operator in Chicago that formed a key part of the city’s urban transit system before consolidation into unified public transportation.
  • C. Missouri Pacific Railroad
    Missouri Pacific Railroad was a major American Class I railroad that operated across the Midwestern and Southwestern United States, playing a key role in regional freight and passenger transportation before its merger into the Union Pacific system.
  • D. Calumet and South Chicago Railway Company
    The Calumet and South Chicago Railway Company was a street railway operator that provided transit services in Chicago’s South Side and surrounding industrial areas in the early 20th century.
  • E. Northern Central Railway
    Northern Central Railway was a historic American railroad that operated primarily in Pennsylvania and Maryland, serving as an important north–south link in the 19th and early 20th centuries.
  • F. None of above. chosen

Provenance (5 batches)

The batch behind each pipeline step, in order, with when it ran. Timestamps are batch-level — stages were processed in waves, so the object chain (NER → NED1 → NEDg → NED2) reads in order, but predicate / elicitation batches can sit in a different wave.

Step Stage Batch ID Status When
creating Elicitation batch_69a2e8004cb88190b92ed1add6abf41a completed Feb. 28, 2026, 1:05 p.m.
NER Named-entity recognition batch_69a2ec8d0ca881909d786e8eed9b6748 completed Feb. 28, 2026, 1:24 p.m.
NED1 Entity disambiguation (via context triple) batch_69a4103f9f588190aabdf7f5d6422d09 completed March 1, 2026, 10:09 a.m.
NEDg Description generation batch_69a410e5ba148190a7fe0ee9861fb334 completed March 1, 2026, 10:11 a.m.
NED2 Entity disambiguation (via description) batch_69a41180ead48190a5edd2e66da413ba completed March 1, 2026, 10:14 a.m.
Created at: Feb. 28, 2026, 1:08 p.m.