British Rail Class 158
E449888
The British Rail Class 158 is a diesel multiple-unit train built in the late 1980s and early 1990s for regional and intercity services across the UK rail network.
All labels observed (2)
| Label | Occurrences |
|---|---|
| British Rail Class 158 canonical | 4 |
| British Rail Sprinter programme | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4509734 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: British Rail Class 158 Context triple: [London Waterloo–Exeter, primaryRollingStock, British Rail Class 158]
-
A.
British Rail Class 159
The British Rail Class 159 is a diesel multiple-unit train used for long-distance regional services in the UK, particularly known for operating intercity-style routes in the southwest of England.
-
B.
British Rail Class 168
The British Rail Class 168 is a diesel multiple-unit train used primarily by Chiltern Railways for regional and intercity services in the United Kingdom.
-
C.
British Rail Class 387
The British Rail Class 387 is a fleet of modern electric multiple-unit trains used on high-speed commuter and airport services in the UK.
-
D.
British Rail Class 395
The British Rail Class 395 is a high-speed electric multiple unit train used in the UK, best known for operating Southeastern’s domestic services on High Speed 1 between London and Kent.
-
E.
British Rail Class 323
The British Rail Class 323 is a type of electric multiple unit train widely used on suburban and commuter rail services in the West Midlands and North West England.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: British Rail Class 158 Target entity description: The British Rail Class 158 is a diesel multiple-unit train built in the late 1980s and early 1990s for regional and intercity services across the UK rail network.
-
A.
British Rail Class 159
The British Rail Class 159 is a diesel multiple-unit train used for long-distance regional services in the UK, particularly known for operating intercity-style routes in the southwest of England.
-
B.
British Rail Class 168
The British Rail Class 168 is a diesel multiple-unit train used primarily by Chiltern Railways for regional and intercity services in the United Kingdom.
-
C.
British Rail Class 387
The British Rail Class 387 is a fleet of modern electric multiple-unit trains used on high-speed commuter and airport services in the UK.
-
D.
British Rail Class 395
The British Rail Class 395 is a high-speed electric multiple unit train used in the UK, best known for operating Southeastern’s domestic services on High Speed 1 between London and Kent.
-
E.
British Rail Class 323
The British Rail Class 323 is a type of electric multiple unit train widely used on suburban and commuter rail services in the West Midlands and North West England.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
diesel multiple unit
ⓘ
passenger train ⓘ rail vehicle class ⓘ |
| brakeType | air brakes ⓘ |
| brandedAs | Express Sprinter NERFINISHED ⓘ |
| buildEnd | 1992 ⓘ |
| buildStart | 1989 ⓘ |
| carBodyConstruction | aluminium ⓘ |
| configuration |
2-car sets
ⓘ
3-car sets ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| coupling | BSI automatic coupler ⓘ |
| designedBy | British Rail Engineering Limited NERFINISHED ⓘ |
| designedFor |
intercity services
ⓘ
long-distance services ⓘ regional services ⓘ |
| doorType | single-leaf sliding plug doors ⓘ |
| enteredService | 1990 ⓘ |
| family | Express Sprinter NERFINISHED ⓘ |
| floorHeight | low-floor design relative to older BR DMUs ⓘ |
| introduced | 1989 ⓘ |
| manufacturer | BREL Derby NERFINISHED ⓘ |
| multipleWorking |
compatible with Class 150
ⓘ
compatible with Class 153 ⓘ compatible with Class 155 ⓘ compatible with Class 156 ⓘ compatible with Class 159 ⓘ |
| numberBuilt | 182 units ⓘ |
| operator |
British Rail
NERFINISHED
ⓘ
East Midlands Railway NERFINISHED ⓘ Great Western Railway NERFINISHED ⓘ Northern Trains ⓘ Regional Railways NERFINISHED ⓘ ScotRail ⓘ South Western Railway NERFINISHED ⓘ Transport for Wales NERFINISHED ⓘ former Arriva Trains Wales ⓘ former Central Trains ⓘ former First North Western ⓘ former Wessex Trains NERFINISHED ⓘ |
| powerType | diesel ⓘ |
| primaryUse | non-electrified main lines ⓘ |
| railwayGauge | standard gauge ⓘ |
| serviceType | regional express services ⓘ |
| successor | British Rail Class 170 NERFINISHED ⓘ |
| topSpeed |
145 km/h
ⓘ
90 mph ⓘ |
| trackGauge | 1435 mm ⓘ |
| transmission | hydraulic transmission ⓘ |
| usedOn | UK rail network ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: British Rail Class 158 Description of subject: The British Rail Class 158 is a diesel multiple-unit train built in the late 1980s and early 1990s for regional and intercity services across the UK rail network.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
British Rail Class 158
this entity surface form:
British Rail Sprinter programme
subject surface form:
British Rail Class 150