Triple
T9302141
| Position | Surface form | Disambiguated ID | Type / Status |
|---|---|---|---|
| Subject | Hatfield rail crash |
E223790
|
entity |
| Predicate | involvedLocomotiveClass |
P31795
|
FINISHED |
| Object | British Rail Class 91 |
E580764
|
NE FINISHED |
How this triple was built (3 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: British Rail Class 91 | Statement: [Hatfield rail crash, involvedLocomotiveClass, British Rail Class 91]
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: British Rail Class 91 Context triple: [Hatfield rail crash, involvedLocomotiveClass, British Rail Class 91]
-
A.
British Rail Class 91
chosen
The British Rail Class 91 is a high-speed electric locomotive built in the late 1980s for InterCity 225 services on the East Coast Main Line, known for its streamlined design and 140 mph capability.
-
B.
British Rail Class 90
The British Rail Class 90 is a class of electric locomotives introduced in the late 1980s for high-speed passenger and freight services on the UK’s electrified main lines.
-
C.
British Rail Class 171
The British Rail Class 171 is a diesel multiple unit train used primarily by Southern in the UK, closely related to the Class 170 but equipped with different coupling systems for compatibility with other Southern stock.
-
D.
British Rail Class 166
The British Rail Class 166 is a diesel multiple-unit train used primarily for regional and commuter services in the UK, known for its higher speed and comfort compared to earlier local units.
-
E.
British Rail Class 165
The British Rail Class 165 is a diesel multiple-unit commuter train used primarily on suburban and regional services in the south of England.
- F. None of above.
- G. Unsure - the case is ambiguous/there is not enough information to decide.
PD
Predicate disambiguation
gpt-5-mini-2025-08-07
Target predicate: involvedLocomotiveClass Context triple: [Hatfield rail crash, involvedLocomotiveClass, British Rail Class 91]
-
A.
typicalLocomotiveClass
Indicates that one locomotive class is the standard or most commonly used class for a given context, operator, or service.
-
B.
hasLocomotive
Indicates that one entity possesses or is equipped with a locomotive as part of its composition or operation.
-
C.
locomotiveNumber
Indicates the identifying number assigned to a locomotive in the relationship.
-
D.
associatedWithLocomotive
chosen
Indicates a relationship where something is connected or related to a locomotive, such as by use, function, origin, or context.
-
E.
locomotiveConfiguration
Indicates the specific arrangement and type of power and running units (e.g., wheel or axle layout) that define how a locomotive is configured.
- F. None of above.
Provenance (4 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_69ca8424d0f08190831e2e93c6533aeb |
completed | March 30, 2026, 2:09 p.m. |
| NER | Named-entity recognition | batch_69cd08d34c4c819095a213360747c3a6 |
completed | April 1, 2026, noon |
| NED1 | Entity disambiguation (via context triple) | batch_69d0b26ae3c881909e88f0253e73f0ea |
completed | April 4, 2026, 6:40 a.m. |
| PD | Predicate disambiguation | batch_69cc7a5ef1908190bc5ca166bb895af6 |
completed | April 1, 2026, 1:52 a.m. |
Created at: March 30, 2026, 7:36 p.m.