Triple

T398899
Position Surface form Disambiguated ID Type / Status
Subject Pittsburgh, Cincinnati, Chicago and St. Louis Railroad E9234 entity
Predicate formedByMergerOf P77 FINISHED
Object Pittsburgh, Cincinnati and St. Louis Railway
The Pittsburgh, Cincinnati and St. Louis Railway was a 19th-century American railroad company that operated lines connecting major Midwestern and Eastern cities before becoming part of the larger Pittsburgh, Cincinnati, Chicago and St. Louis Railroad system.
E9234 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: Pittsburgh, Cincinnati and St. Louis Railway | Statement: [Pittsburgh, Cincinnati, Chicago and St. Louis Railroad, formedByMergerOf, Pittsburgh, Cincinnati and St. Louis Railway]
NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07
Target entity: Pittsburgh, Cincinnati and St. Louis Railway
Context triple: [Pittsburgh, Cincinnati, Chicago and St. Louis Railroad, formedByMergerOf, Pittsburgh, Cincinnati and St. Louis Railway]
  • A. Pittsburgh, Cincinnati, Chicago and St. Louis Railroad
    The Pittsburgh, Cincinnati, Chicago and St. Louis Railroad was a major Midwestern and Mid-Atlantic rail system that formed a key part of the Pennsylvania Railroad’s network, linking important industrial cities across the region.
  • 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. Baltimore and Ohio Railroad
    The Baltimore and Ohio Railroad was one of the earliest and most influential American railroads, playing a key role in the development of U.S. transportation and commerce in the 19th and early 20th centuries.
  • E. Pennsylvania Railroad Company
    The Pennsylvania Railroad Company was one of the largest and most influential American railroads of the 19th and early 20th centuries, playing a central role in the industrial development of the United States.
  • 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: Pittsburgh, Cincinnati and St. Louis Railway
Triple: [Pittsburgh, Cincinnati, Chicago and St. Louis Railroad, formedByMergerOf, Pittsburgh, Cincinnati and St. Louis Railway]
Generated description
The Pittsburgh, Cincinnati and St. Louis Railway was a 19th-century American railroad company that operated lines connecting major Midwestern and Eastern cities before becoming part of the larger Pittsburgh, Cincinnati, Chicago and St. Louis Railroad system.
NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07
Target entity: Pittsburgh, Cincinnati and St. Louis Railway
Target entity description: The Pittsburgh, Cincinnati and St. Louis Railway was a 19th-century American railroad company that operated lines connecting major Midwestern and Eastern cities before becoming part of the larger Pittsburgh, Cincinnati, Chicago and St. Louis Railroad system.
  • A. Pittsburgh, Cincinnati, Chicago and St. Louis Railroad chosen
    The Pittsburgh, Cincinnati, Chicago and St. Louis Railroad was a major Midwestern and Mid-Atlantic rail system that formed a key part of the Pennsylvania Railroad’s network, linking important industrial cities across the region.
  • 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. Baltimore and Ohio Railroad
    The Baltimore and Ohio Railroad was one of the earliest and most influential American railroads, playing a key role in the development of U.S. transportation and commerce in the 19th and early 20th centuries.
  • E. Pennsylvania Railroad Company
    The Pennsylvania Railroad Company was one of the largest and most influential American railroads of the 19th and early 20th centuries, playing a central role in the industrial development of the United States.
  • F. None of above.

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_69a4254075388190af8fd09d037f427c completed March 1, 2026, 11:38 a.m.
NEDg Description generation batch_69a4261531ac8190aa879bf38bfd9371 completed March 1, 2026, 11:42 a.m.
NED2 Entity disambiguation (via description) batch_69a4267b09b4819085db5e073cc19360 completed March 1, 2026, 11:43 a.m.
Created at: Feb. 28, 2026, 1:08 p.m.