Triple

T2865414

Position	Surface form	Disambiguated ID	Type / Status
Subject	Chesapeake and Ohio Railway	`E63425`	entity
Predicate	formedByMergerOf	`P77`	FINISHED
Object	Covington and Ohio Railroad The Covington and Ohio Railroad was a 19th-century American railway company that became part of the Chesapeake and Ohio Railway through consolidation.	`E305228`	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: Covington and Ohio Railroad | Statement: [Chesapeake and Ohio Railway, formedByMergerOf, Covington and Ohio Railroad]

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

Target entity: Covington and Ohio Railroad
Context triple: [Chesapeake and Ohio Railway, formedByMergerOf, Covington and Ohio Railroad]

A. Durbin and Greenbrier Valley Railroad
The Durbin and Greenbrier Valley Railroad is a heritage railroad in West Virginia that operates scenic tourist excursions through the Allegheny Mountains using historic locomotives and rolling stock.
B. Louisville and Nashville Railroad
The Louisville and Nashville Railroad was a major U.S. railroad company that operated across the southeastern United States from the 19th century into the late 20th century, playing a key role in regional freight and passenger transportation.
C. Cleveland Railway
Cleveland Railway was a major early 20th-century streetcar and public transit company serving the city of Cleveland, Ohio.
D. Cumberland Valley Railroad
The Cumberland Valley Railroad was a historic American railroad that operated primarily in south-central Pennsylvania and northern Maryland, playing a key role in regional transportation during the 19th and early 20th centuries.
E. 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.
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: Covington and Ohio Railroad
Triple: [Chesapeake and Ohio Railway, formedByMergerOf, Covington and Ohio Railroad]

Generated description

The Covington and Ohio Railroad was a 19th-century American railway company that became part of the Chesapeake and Ohio Railway through consolidation.

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

Target entity: Covington and Ohio Railroad
Target entity description: The Covington and Ohio Railroad was a 19th-century American railway company that became part of the Chesapeake and Ohio Railway through consolidation.

A. Durbin and Greenbrier Valley Railroad
The Durbin and Greenbrier Valley Railroad is a heritage railroad in West Virginia that operates scenic tourist excursions through the Allegheny Mountains using historic locomotives and rolling stock.
B. Louisville and Nashville Railroad
The Louisville and Nashville Railroad was a major U.S. railroad company that operated across the southeastern United States from the 19th century into the late 20th century, playing a key role in regional freight and passenger transportation.
C. Cleveland Railway
Cleveland Railway was a major early 20th-century streetcar and public transit company serving the city of Cleveland, Ohio.
D. Cumberland Valley Railroad
The Cumberland Valley Railroad was a historic American railroad that operated primarily in south-central Pennsylvania and northern Maryland, playing a key role in regional transportation during the 19th and early 20th centuries.
E. 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.
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_69ab4c42fb8c8190b36e161d47c03b81`	completed	March 6, 2026, 9:50 p.m.
NER	Named-entity recognition	`batch_69abdfb9e64c819087b1a47caeb174d5`	completed	March 7, 2026, 8:20 a.m.
NED1	Entity disambiguation (via context triple)	`batch_69b01da458ec8190ae07237d7e23b302`	completed	March 10, 2026, 1:33 p.m.
NEDg	Description generation	`batch_69b01e45f6e481908665e0961c3a3778`	completed	March 10, 2026, 1:36 p.m.
NED2	Entity disambiguation (via description)	`batch_69b0224832108190be252c0245d588d2`	completed	March 10, 2026, 1:53 p.m.

Created at: March 6, 2026, 10:02 p.m.