Class 317 EMU
E645293
The Class 317 EMU is a type of British electric multiple unit train introduced in the early 1980s for suburban and commuter services on 25 kV AC overhead electrified routes.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Mark 3-based EMU | 2 |
| Class 317 EMU canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7040706 — 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 317 EMU Context triple: [Hertford East branch line, primaryRollingStock, Class 317 EMU]
-
A.
Class 313 EMU
The Class 313 EMU is a British dual-voltage electric multiple unit train introduced in the 1970s, notable for being among the first of its kind to operate on both overhead and third-rail power systems.
-
B.
Class 745 EMU
The Class 745 EMU is a modern electric multiple unit train used on regional and intercity services in the UK, built for high-capacity, high-comfort passenger operations.
-
C.
Class 455 EMU
The Class 455 EMU is a type of British electric multiple unit train introduced in the early 1980s for suburban commuter services in the South East of England.
-
D.
Class 720 EMU
The Class 720 EMU is a modern British electric multiple unit train built for high-capacity commuter and regional services, primarily operated in East Anglia.
-
E.
Class 397 Civity EMU
The Class 397 Civity EMU is a modern high-speed electric multiple unit built by CAF for intercity services in the UK, notably on routes linking north of England cities with Scotland.
- 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 317 EMU Target entity description: The Class 317 EMU is a type of British electric multiple unit train introduced in the early 1980s for suburban and commuter services on 25 kV AC overhead electrified routes.
-
A.
Class 313 EMU
The Class 313 EMU is a British dual-voltage electric multiple unit train introduced in the 1970s, notable for being among the first of its kind to operate on both overhead and third-rail power systems.
-
B.
Class 745 EMU
The Class 745 EMU is a modern electric multiple unit train used on regional and intercity services in the UK, built for high-capacity, high-comfort passenger operations.
-
C.
Class 455 EMU
The Class 455 EMU is a type of British electric multiple unit train introduced in the early 1980s for suburban commuter services in the South East of England.
-
D.
Class 720 EMU
The Class 720 EMU is a modern British electric multiple unit train built for high-capacity commuter and regional services, primarily operated in East Anglia.
-
E.
Class 397 Civity EMU
The Class 397 Civity EMU is a modern high-speed electric multiple unit built by CAF for intercity services in the UK, notably on routes linking north of England cities with Scotland.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
electric multiple unit
ⓘ
railway rolling stock class ⓘ |
| brakeType | air brakes ⓘ |
| carBodyConstruction | steel ⓘ |
| collectionMethod | overhead line ⓘ |
| country | United Kingdom ⓘ |
| couplingType | Tightlock ⓘ |
| designer | British Rail Engineering Limited ⓘ |
| doorType | slam doors ⓘ |
| electricSystem | 25 kV AC overhead ⓘ |
| enteredService | 1983 ⓘ |
| family | BREL 1980s EMU family ⓘ |
| formation | 4-car unit ⓘ |
| gauge | standard gauge ⓘ |
| introduced | 1981 ⓘ |
| introducedFor |
commuter services on West Coast Main Line and East Coast Main Line suburban routes
ⓘ
suburban services from London ⓘ |
| length | about 80 m per 4-car unit ⓘ |
| manufacturer | BREL York ⓘ |
| multipleWorking |
compatible with Class 313
ⓘ
compatible with Class 314 ⓘ compatible with Class 315 ⓘ compatible with Class 507 ⓘ compatible with Class 508 ⓘ |
| numberBuilt | 72 units ⓘ |
| operator |
British Rail
ⓘ
First Capital Connect ⓘ Greater Anglia ⓘ London Overground ⓘ Network SouthEast ⓘ WAGN ⓘ |
| powerCollectionMethod | pantograph ⓘ |
| powerOutput | approximately 746 kW per unit ⓘ |
| powerType | electric ⓘ |
| primaryRouteType | 25 kV AC overhead electrified routes ⓘ |
| serviceType |
commuter
ⓘ
suburban ⓘ |
| successor |
British Rail Class 365
ⓘ
British Rail Class 379 ⓘ British Rail Class 387 ⓘ |
| topSpeed |
100 mph
ⓘ
161 km/h ⓘ |
| trackGauge | 1435 mm ⓘ |
| UICClassification | Bo′Bo′+2′2′+2′2′+Bo′Bo′ ⓘ |
| usedOn |
Great Northern suburban services
ⓘ
linked to:
Great Northern suburban network
London commuter services ⓘ West Anglia routes ⓘ |
| yearConstructionCompleted | 1986 ⓘ |
| yearConstructionStarted | 1981 ⓘ |
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 317 EMU Description of subject: The Class 317 EMU is a type of British electric multiple unit train introduced in the early 1980s for suburban and commuter services on 25 kV AC overhead electrified routes.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Class 319
linked to: Class 317 EMU
subject linked to:
Class 321 electric multiple unit
linked to: Class 317 EMU