Triple

T13484228

Position	Surface form	Disambiguated ID	Type / Status
Subject	Harrow & Wealdstone	`E318451`	entity
Predicate	hasEvent	`P811`	FINISHED
Object	Harrow and Wealdstone rail crash The Harrow and Wealdstone rail crash was a catastrophic 1952 railway accident in London involving multiple trains, resulting in one of the deadliest peacetime rail disasters in British history.	`E1042028`	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: Harrow and Wealdstone rail crash | Statement: [Harrow & Wealdstone, hasEvent, Harrow and Wealdstone rail crash]

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

Target entity: Harrow and Wealdstone rail crash
Context triple: [Harrow & Wealdstone, hasEvent, Harrow and Wealdstone rail crash]

A. Ladbroke Grove rail crash
The Ladbroke Grove rail crash was a major 1999 train collision near Paddington Station in London that resulted in 31 deaths, over 500 injuries, and significant scrutiny of UK rail safety and signaling practices.
B. Southall rail crash
The Southall rail crash was a major 1997 high-speed train collision in West London that killed seven people, injured dozens, and raised serious concerns about railway safety and signal-passing procedures in the UK.
C. Shipton-on-Cherwell train crash
The Shipton-on-Cherwell train crash was a major 1874 railway disaster in Oxfordshire, England, in which a derailment caused by a broken wheel led to numerous deaths and injuries and prompted significant improvements in railway safety.
D. Hatfield rail crash
The Hatfield rail crash was a fatal 2000 train derailment in Hertfordshire, England, that exposed serious track maintenance failures and triggered major reforms in the UK rail industry.
E. Kegworth air disaster
The Kegworth air disaster was a 1989 British Midland Boeing 737 crash near Kegworth, Leicestershire, that killed 47 people and led to major changes in aviation safety and crew training.
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: Harrow and Wealdstone rail crash
Triple: [Harrow & Wealdstone, hasEvent, Harrow and Wealdstone rail crash]

Generated description

The Harrow and Wealdstone rail crash was a catastrophic 1952 railway accident in London involving multiple trains, resulting in one of the deadliest peacetime rail disasters in British history.

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

Target entity: Harrow and Wealdstone rail crash
Target entity description: The Harrow and Wealdstone rail crash was a catastrophic 1952 railway accident in London involving multiple trains, resulting in one of the deadliest peacetime rail disasters in British history.

A. Ladbroke Grove rail crash
The Ladbroke Grove rail crash was a major 1999 train collision near Paddington Station in London that resulted in 31 deaths, over 500 injuries, and significant scrutiny of UK rail safety and signaling practices.
B. Southall rail crash
The Southall rail crash was a major 1997 high-speed train collision in West London that killed seven people, injured dozens, and raised serious concerns about railway safety and signal-passing procedures in the UK.
C. Shipton-on-Cherwell train crash
The Shipton-on-Cherwell train crash was a major 1874 railway disaster in Oxfordshire, England, in which a derailment caused by a broken wheel led to numerous deaths and injuries and prompted significant improvements in railway safety.
D. Hatfield rail crash
The Hatfield rail crash was a fatal 2000 train derailment in Hertfordshire, England, that exposed serious track maintenance failures and triggered major reforms in the UK rail industry.
E. Kegworth air disaster
The Kegworth air disaster was a 1989 British Midland Boeing 737 crash near Kegworth, Leicestershire, that killed 47 people and led to major changes in aviation safety and crew training.
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_69d806b6bfec819089222715b2e86c8e`	completed	April 9, 2026, 8:06 p.m.
NER	Named-entity recognition	`batch_69dbaf3868ec8190a6a1803018d4f2d8`	completed	April 12, 2026, 2:42 p.m.
NED1	Entity disambiguation (via context triple)	`batch_69f7463715dc8190a70a17b3ea661006`	completed	May 3, 2026, 12:57 p.m.
NEDg	Description generation	`batch_69f74bac36e081909dae786e14883e3c`	completed	May 3, 2026, 1:20 p.m.
NED2	Entity disambiguation (via description)	`batch_69f74c5195188190bad111b301713426`	completed	May 3, 2026, 1:23 p.m.

Created at: April 9, 2026, 9:42 p.m.