Class 321 electric multiple unit
E549676
The Class 321 electric multiple unit is a British suburban and commuter train type introduced in the late 1980s for high-capacity, overhead-electrified passenger services.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Class 321 electric multiple unit canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5842020 — 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: Class 321 electric multiple unit Context triple: [Central Trains, operatedRollingStockType, Class 321 electric multiple unit]
-
A.
Class 365 electric multiple unit
The Class 365 electric multiple unit is a British dual-voltage commuter train type introduced in the 1990s for high-frequency suburban and regional services, primarily around London and the southeast.
-
B.
Class 360 electric multiple unit
The Class 360 electric multiple unit is a type of British high-speed commuter train used on electrified mainline routes for regional and outer-suburban passenger services.
-
C.
Class 385 electric multiple units
The Class 385 electric multiple units are modern electric commuter trains used by ScotRail, primarily operating on electrified routes in Scotland’s Central Belt.
-
D.
Class 71 electric multiple unit
The Class 71 electric multiple unit is a high-speed Norwegian train type used primarily for Flytoget’s airport express services between Oslo and Oslo Airport Gardermoen.
-
E.
Class 700 electric multiple unit
The Class 700 electric multiple unit is a modern high-capacity commuter train used on Thameslink and related services in the UK, designed for intensive suburban and cross-London operations.
- 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: Class 321 electric multiple unit Target entity description: The Class 321 electric multiple unit is a British suburban and commuter train type introduced in the late 1980s for high-capacity, overhead-electrified passenger services.
-
A.
Class 365 electric multiple unit
The Class 365 electric multiple unit is a British dual-voltage commuter train type introduced in the 1990s for high-frequency suburban and regional services, primarily around London and the southeast.
-
B.
Class 360 electric multiple unit
The Class 360 electric multiple unit is a type of British high-speed commuter train used on electrified mainline routes for regional and outer-suburban passenger services.
-
C.
Class 385 electric multiple units
The Class 385 electric multiple units are modern electric commuter trains used by ScotRail, primarily operating on electrified routes in Scotland’s Central Belt.
-
D.
Class 71 electric multiple unit
The Class 71 electric multiple unit is a high-speed Norwegian train type used primarily for Flytoget’s airport express services between Oslo and Oslo Airport Gardermoen.
-
E.
Class 700 electric multiple unit
The Class 700 electric multiple unit is a modern high-capacity commuter train used on Thameslink and related services in the UK, designed for intensive suburban and cross-London operations.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
electric multiple unit
ⓘ
suburban train ⓘ |
| bodyConstruction | steel ⓘ |
| brakingSystem | air brakes ⓘ |
| builtFor | Network SouthEast NERFINISHED ⓘ |
| carFormation | 4-car units ⓘ |
| country | United Kingdom ⓘ |
| couplingType | Tightlock ⓘ |
| designedBy | British Rail Engineering Limited NERFINISHED ⓘ |
| designedFor |
commuter services
ⓘ
high-capacity passenger services ⓘ overhead-electrified passenger services ⓘ suburban services ⓘ |
| doorType | sliding plug doors ⓘ |
| electrificationSystem | 25 kV AC overhead ⓘ |
| enteredService |
1988
ⓘ
1989 ⓘ |
| family | Mark 3-based EMU NERFINISHED ⓘ |
| hasSubclass |
Class 321/3
NERFINISHED
ⓘ
Class 321/4 NERFINISHED ⓘ Class 321/9 NERFINISHED ⓘ |
| introduced |
1988
ⓘ
1989 ⓘ late 1980s ⓘ |
| lengthPerCar | approximately 20 m ⓘ |
| manufacturer | BREL York NERFINISHED ⓘ |
| multipleWorking | compatible with other 25 kV AC EMUs ⓘ |
| numberOfCarsPerSet | 4 ⓘ |
| operator |
British Rail
NERFINISHED
ⓘ
Greater Anglia NERFINISHED ⓘ London Midland NERFINISHED ⓘ Network SouthEast NERFINISHED ⓘ ScotRail ⓘ Silverlink NERFINISHED ⓘ |
| powerCollectionMethod | overhead line ⓘ |
| powerType | electric ⓘ |
| serviceArea | England NERFINISHED ⓘ |
| serviceRole | outer-suburban EMU ⓘ |
| serviceType | passenger ⓘ |
| topSpeed |
100 mph
ⓘ
161 km/h ⓘ |
| trackGauge |
1435 mm
ⓘ
standard gauge ⓘ |
| UICClassification | Bo′Bo′+2′2′+2′2′+Bo′Bo′ ⓘ |
| usedOn |
commuter routes into London
ⓘ
regional services in the Midlands ⓘ suburban routes in East Anglia ⓘ |
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: Class 321 electric multiple unit Description of subject: The Class 321 electric multiple unit is a British suburban and commuter train type introduced in the late 1980s for high-capacity, overhead-electrified passenger services.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Central Trains