Triple

T17420621

Position	Surface form	Disambiguated ID	Type / Status
Subject	North Eastern Railway zone	`E423601`	entity
Predicate	formedByMergerOf	`P77`	FINISHED
Object	Oudh and Tirhut Railway Oudh and Tirhut Railway was a former railway company in northern India that later became part of the Indian Railways network through mergers and reorganization.	`E1268195`	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: Oudh and Tirhut Railway | Statement: [North Eastern Railway zone, formedByMergerOf, Oudh and Tirhut Railway]

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

Target entity: Oudh and Tirhut Railway
Context triple: [North Eastern Railway zone, formedByMergerOf, Oudh and Tirhut Railway]

A. Portions of Oudh and Tirhut Railway
Portions of Oudh and Tirhut Railway refers to sections of a former colonial-era railway system in northern India that were later incorporated into the Indian Railways network, including the Northern Railway zone.
B. Bengal Nagpur Railway
Bengal Nagpur Railway was a major British-era railway company in eastern and central India that played a key role in regional rail development before being absorbed into the post-independence Indian Railways system.
C. Scindia State Railway
Scindia State Railway was a former princely-state-owned railway system in India that later became part of the nationalized network and contributed to the formation of the Central Railway zone.
D. Bombay, Baroda and Central India Railway
The Bombay, Baroda and Central India Railway was a major British-era Indian railway company that operated extensive routes in western and central India before being absorbed into the Western Railway zone after independence.
E. Eastern Punjab Railway
Eastern Punjab Railway was a former railway system in British India that operated in the eastern part of the Punjab region before being absorbed into the Northern Railway zone after independence and partition.
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: Oudh and Tirhut Railway
Triple: [North Eastern Railway zone, formedByMergerOf, Oudh and Tirhut Railway]

Generated description

Oudh and Tirhut Railway was a former railway company in northern India that later became part of the Indian Railways network through mergers and reorganization.

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

Target entity: Oudh and Tirhut Railway
Target entity description: Oudh and Tirhut Railway was a former railway company in northern India that later became part of the Indian Railways network through mergers and reorganization.

A. Portions of Oudh and Tirhut Railway
Portions of Oudh and Tirhut Railway refers to sections of a former colonial-era railway system in northern India that were later incorporated into the Indian Railways network, including the Northern Railway zone.
B. Bengal Nagpur Railway
Bengal Nagpur Railway was a major British-era railway company in eastern and central India that played a key role in regional rail development before being absorbed into the post-independence Indian Railways system.
C. Scindia State Railway
Scindia State Railway was a former princely-state-owned railway system in India that later became part of the nationalized network and contributed to the formation of the Central Railway zone.
D. Bombay, Baroda and Central India Railway
The Bombay, Baroda and Central India Railway was a major British-era Indian railway company that operated extensive routes in western and central India before being absorbed into the Western Railway zone after independence.
E. Eastern Punjab Railway
Eastern Punjab Railway was a former railway system in British India that operated in the eastern part of the Punjab region before being absorbed into the Northern Railway zone after independence and partition.
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_69d889d7d27c819088486ce3f0627fa1`	completed	April 10, 2026, 5:25 a.m.
NER	Named-entity recognition	`batch_69e442372954819085f332efc7067ae9`	completed	April 19, 2026, 2:47 a.m.
NED1	Entity disambiguation (via context triple)	`batch_6a01a8041f548190a076b10516ccfced`	completed	May 11, 2026, 9:57 a.m.
NEDg	Description generation	`batch_6a01a8d7e05c8190aceb0795a430fee7`	completed	May 11, 2026, 10 a.m.
NED2	Entity disambiguation (via description)	`batch_6a01a943fdec8190a875c7eb56c742da`	completed	May 11, 2026, 10:02 a.m.

Created at: April 10, 2026, 5:46 a.m.