British Rail Class 91
E580764
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| British Rail Class 91 canonical | 3 |
| British Rail Class 91 + Mark 4 sets | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5560007 — 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 91 Context triple: [Advanced Passenger Train, influenced, British Rail Class 91]
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
British Rail Class 153
The British Rail Class 153 is a single-car diesel multiple unit train used on regional and rural passenger services across the UK rail network.
- 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 91 Target entity description: 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.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
British Rail Class 153
The British Rail Class 153 is a single-car diesel multiple unit train used on regional and rural passenger services across the UK rail network.
- F. None of above. chosen
Statements (54)
| Predicate | Object |
|---|---|
| instanceOf |
British Rail locomotive class
ⓘ
electric locomotive ⓘ high-speed locomotive ⓘ |
| brakeType | air ⓘ |
| buildEnd | 1991 ⓘ |
| builder | BREL Crewe Works NERFINISHED ⓘ |
| buildStart | 1988 ⓘ |
| collectionMethod | pantograph ⓘ |
| configuration | push–pull ⓘ |
| controlType | electric multiple-unit style cab controls ⓘ |
| country | United Kingdom ⓘ |
| designedBy | BREL NERFINISHED ⓘ |
| designedForSpeed | 140 mph ⓘ |
| designFeature |
aerodynamic cab ends
ⓘ
streamlined body ⓘ |
| electricSystem | 25 kV AC overhead ⓘ |
| enteredService | 1989 ⓘ |
| family | InterCity 225 NERFINISHED ⓘ |
| gauge | standard gauge ⓘ |
| introduced | 1989 ⓘ |
| livery |
GNER blue
ⓘ
LNER red and white ⓘ National Express white ⓘ Virgin Trains East Coast red ⓘ original InterCity swallow livery ⓘ |
| manufacturer | British Rail Engineering Limited NERFINISHED ⓘ |
| nickName |
InterCity 225 locomotive
NERFINISHED
ⓘ
Streak ⓘ |
| numberBuilt | 31 ⓘ |
| operator |
British Rail
NERFINISHED
ⓘ
East Coast NERFINISHED ⓘ GNER NERFINISHED ⓘ InterCity NERFINISHED ⓘ London North Eastern Railway NERFINISHED ⓘ National Express East Coast NERFINISHED ⓘ Virgin Trains East Coast NERFINISHED ⓘ |
| powerOutput | around 6400 kW ⓘ |
| powerType | electric ⓘ |
| primaryCorridor | East Coast Main Line NERFINISHED ⓘ |
| primaryUse | passenger services ⓘ |
| route |
London King’s Cross to Edinburgh Waverley
NERFINISHED
ⓘ
London King’s Cross to Leeds NERFINISHED ⓘ |
| serviceName | InterCity 225 NERFINISHED ⓘ |
| successor |
British Rail Class 800
NERFINISHED
ⓘ
British Rail Class 801 NERFINISHED ⓘ |
| topSpeed |
140 mph
ⓘ
225 km/h ⓘ |
| trackGauge | 1435 mm ⓘ |
| trainHeating | Electric Train Heating ⓘ |
| trainSetBranding | InterCity 225 NERFINISHED ⓘ |
| trainSetMaximumSpeed | 225 km/h ⓘ |
| typicalFormation | Class 91 + Mark 4 coaches + Driving Van Trailer NERFINISHED ⓘ |
| UICClassification | Bo′Bo′ ⓘ |
| usedOnLine | East Coast Main Line NERFINISHED ⓘ |
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 91 Description of subject: 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.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
British Rail Class 800
this entity surface form:
British Rail Class 91 + Mark 4 sets