Triple

T500463

Position	Surface form	Disambiguated ID	Type / Status
Subject	CSX Transportation	`E10387`	entity
Predicate	predecessor	`P97`	FINISHED
Object	Chesapeake and Ohio Railway The Chesapeake and Ohio Railway was a major American railroad best known for hauling Appalachian coal and operating key routes through the Mid-Atlantic and Midwest before becoming part of the modern CSX rail system.	`E63425`	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: Chesapeake and Ohio Railway | Statement: [CSX Transportation, predecessor, Chesapeake and Ohio Railway]

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Chesapeake and Ohio Railway
Context triple: [CSX Transportation, predecessor, Chesapeake and Ohio Railway]

A. 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.
B. Baltimore and Susquehanna Railroad
The Baltimore and Susquehanna Railroad was an early 19th-century American railroad that helped pioneer rail transportation in Maryland and Pennsylvania, eventually becoming part of the Northern Central Railway system.
C. Norfolk Southern Railway
Norfolk Southern Railway is a major U.S. freight railroad company operating an extensive rail network across the eastern United States.
D. Seaboard Air Line Railroad
Seaboard Air Line Railroad was a major American railroad that operated in the southeastern United States, known for its prominent passenger services and streamlined trains.
E. 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.
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: Chesapeake and Ohio Railway
Triple: [CSX Transportation, predecessor, Chesapeake and Ohio Railway]

Generated description

The Chesapeake and Ohio Railway was a major American railroad best known for hauling Appalachian coal and operating key routes through the Mid-Atlantic and Midwest before becoming part of the modern CSX rail system.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Chesapeake and Ohio Railway
Target entity description: The Chesapeake and Ohio Railway was a major American railroad best known for hauling Appalachian coal and operating key routes through the Mid-Atlantic and Midwest before becoming part of the modern CSX rail system.

A. 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.
B. Baltimore and Susquehanna Railroad
The Baltimore and Susquehanna Railroad was an early 19th-century American railroad that helped pioneer rail transportation in Maryland and Pennsylvania, eventually becoming part of the Northern Central Railway system.
C. Norfolk Southern Railway
Norfolk Southern Railway is a major U.S. freight railroad company operating an extensive rail network across the eastern United States.
D. Seaboard Air Line Railroad
Seaboard Air Line Railroad was a major American railroad that operated in the southeastern United States, known for its prominent passenger services and streamlined trains.
E. 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.
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_69a2e847df8481909239ec08ccf1e376`	completed	Feb. 28, 2026, 1:06 p.m.
NER	Named-entity recognition	`batch_69a2f13096248190a622a58dcf540b00`	completed	Feb. 28, 2026, 1:44 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69a4984d3a4881909b4bec4c9b7dcd03`	completed	March 1, 2026, 7:49 p.m.
NEDg	Description generation	`batch_69a49c5d940c8190802f51ddd722913d`	completed	March 1, 2026, 8:06 p.m.
NED2	Entity disambiguation (via description)	`batch_69a49dc00084819088f75c7ff9d93f94`	completed	March 1, 2026, 8:12 p.m.

Created at: Feb. 28, 2026, 1:12 p.m.