Triple

T6963225

Position	Surface form	Disambiguated ID	Type / Status
Subject	First Capital Connect	`E161423`	entity
Predicate	operatedLine	`P848`	FINISHED
Object	Midland Main Line (southern section via Thameslink) Midland Main Line (southern section via Thameslink) is the portion of the Midland Main Line that runs through central London via the Thameslink core, providing cross-London commuter and regional rail services.	`E630535`	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: Midland Main Line (southern section via Thameslink) | Statement: [First Capital Connect, operatedLine, Midland Main Line (southern section via Thameslink)]

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

Target entity: Midland Main Line (southern section via Thameslink)
Context triple: [First Capital Connect, operatedLine, Midland Main Line (southern section via Thameslink)]

A. South West Main Line (London Waterloo to Basingstoke)
The South West Main Line (London Waterloo to Basingstoke) is a key commuter and intercity railway corridor in southern England, linking central London with Hampshire and serving as the first section of the main route toward southwest England.
B. Oxford–Bicester line
The Oxford–Bicester line is a railway route in Oxfordshire, England, connecting Oxford with the town of Bicester as part of the regional and commuter rail network.
C. Birmingham–Leamington Spa line
The Birmingham–Leamington Spa line is a railway route in the West Midlands and Warwickshire connecting Birmingham with Leamington Spa, used for both regional passenger services and some longer-distance trains.
D. Wessex Main Line
The Wessex Main Line is a key railway route in southern England linking Bristol and Bath with Salisbury and Southampton, serving as an important regional passenger corridor.
E. South Eastern Main Line
The South Eastern Main Line is a major railway route in southeast England connecting London with key towns in Kent and the surrounding 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: Midland Main Line (southern section via Thameslink)
Triple: [First Capital Connect, operatedLine, Midland Main Line (southern section via Thameslink)]

Generated description

Midland Main Line (southern section via Thameslink) is the portion of the Midland Main Line that runs through central London via the Thameslink core, providing cross-London commuter and regional rail services.

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

Target entity: Midland Main Line (southern section via Thameslink)
Target entity description: Midland Main Line (southern section via Thameslink) is the portion of the Midland Main Line that runs through central London via the Thameslink core, providing cross-London commuter and regional rail services.

A. South West Main Line (London Waterloo to Basingstoke)
The South West Main Line (London Waterloo to Basingstoke) is a key commuter and intercity railway corridor in southern England, linking central London with Hampshire and serving as the first section of the main route toward southwest England.
B. Oxford–Bicester line
The Oxford–Bicester line is a railway route in Oxfordshire, England, connecting Oxford with the town of Bicester as part of the regional and commuter rail network.
C. Birmingham–Leamington Spa line
The Birmingham–Leamington Spa line is a railway route in the West Midlands and Warwickshire connecting Birmingham with Leamington Spa, used for both regional passenger services and some longer-distance trains.
D. Wessex Main Line
The Wessex Main Line is a key railway route in southern England linking Bristol and Bath with Salisbury and Southampton, serving as an important regional passenger corridor.
E. South Eastern Main Line
The South Eastern Main Line is a major railway route in southeast England connecting London with key towns in Kent and the surrounding 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_69c68853cff881908439d488924a8283`	completed	March 27, 2026, 1:38 p.m.
NER	Named-entity recognition	`batch_69c6daf197b0819085bd0433c8a7f716`	completed	March 27, 2026, 7:30 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69c7589c587c8190b97523b5ac2ab958`	completed	March 28, 2026, 4:27 a.m.
NEDg	Description generation	`batch_69c759553fe081909881c8d2ae680dfe`	completed	March 28, 2026, 4:30 a.m.
NED2	Entity disambiguation (via description)	`batch_69c759c79de48190bd3e079c07a9158a`	completed	March 28, 2026, 4:32 a.m.

Created at: March 27, 2026, 2:30 p.m.