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.