British Rail Class 168
E148104
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| British Rail Class 168 canonical | 6 |
| Chiltern Railways Class 168 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1140369 — 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 168 Context triple: [British Rail Class 170, relatedTo, British Rail Class 168]
-
A.
British Rail Class 172
The British Rail Class 172 is a diesel multiple-unit train used on regional and suburban services in the UK, featuring improved performance, reliability, and passenger comfort over earlier Turbostar units.
-
B.
British Rail Class 377
The British Rail Class 377 is a fleet of electric multiple-unit commuter trains widely used in southeast England, particularly by Govia Thameslink Railway services.
-
C.
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.
-
D.
British Rail Class 47
The British Rail Class 47 is a widely used diesel-electric locomotive class introduced in the 1960s, notable for its extensive service across the UK rail network with both passenger and freight trains.
-
E.
British Rail Class 375
The British Rail Class 375 is a fleet of electric multiple-unit passenger trains operated by Southeastern on suburban and regional services in southeast 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 168 Target entity description: 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.
-
A.
British Rail Class 172
The British Rail Class 172 is a diesel multiple-unit train used on regional and suburban services in the UK, featuring improved performance, reliability, and passenger comfort over earlier Turbostar units.
-
B.
British Rail Class 377
The British Rail Class 377 is a fleet of electric multiple-unit commuter trains widely used in southeast England, particularly by Govia Thameslink Railway services.
-
C.
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.
-
D.
British Rail Class 47
The British Rail Class 47 is a widely used diesel-electric locomotive class introduced in the 1960s, notable for its extensive service across the UK rail network with both passenger and freight trains.
-
E.
British Rail Class 375
The British Rail Class 375 is a fleet of electric multiple-unit passenger trains operated by Southeastern on suburban and regional services in southeast England.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
diesel multiple unit
ⓘ
passenger train ⓘ railway rolling stock class ⓘ |
| brakeType | air brakes ⓘ |
| builtFor | privatised British railway market ⓘ |
| carBodyConstruction | steel ⓘ |
| category |
British diesel multiple units
ⓘ
Chiltern Railways rolling stock ⓘ |
| country | United Kingdom ⓘ |
| couplingType | BSI automatic coupler ⓘ |
| designedBy |
Adtranz (original design)
ⓘ
linked to:
ADtranz
|
| designedFor | 100 mph operation ⓘ |
| doorType | power-operated sliding plug doors ⓘ |
| engineType | diesel engine ⓘ |
| enteredService | 1998 ⓘ |
| family | Turbostar ⓘ |
| familyRelation | closely related to British Rail Class 170 ⓘ |
| gauge | standard gauge ⓘ |
| introduced | 1998 ⓘ |
| livery | Chiltern Railways corporate livery ⓘ |
| manufacturer |
Adtranz
ⓘ
linked to:
ADtranz
Bombardier Transportation ⓘ
linked to:
Alstom (formerly Bombardier Transportation)
|
| multipleWorking |
compatible with Class 170
ⓘ
compatible with other Turbostar units ⓘ |
| numberingSystem | Class 168/0, 168/1, 168/2 subclasses ⓘ |
| operator |
Chiltern Railways
ⓘ
Chiltern Railways (primary) ⓘ
linked to:
Chiltern Railways
Mainline Trains (past) ⓘ operated under Chiltern Railways franchise ⓘ |
| owner | rolling stock leasing companies (ROSCOs) ⓘ |
| powerSupply | diesel mechanical or diesel-electric transmission (Turbostar family characteristic) ⓘ |
| powerType | diesel ⓘ |
| primaryUse |
intercity services
ⓘ
regional services ⓘ |
| region |
Chiltern route
ⓘ
linked to:
Chiltern Main Line
|
| safetySystem |
AWS
ⓘ
TPWS ⓘ |
| serviceArea | England ⓘ |
| serviceType |
long-distance commuter services
ⓘ
regional express services ⓘ |
| successorFamily | basis for later Turbostar variants ⓘ |
| trackGauge | 1435 mm ⓘ |
| UICClassification | Bo′2′+2′2′ (typical formation) ⓘ |
| usedOnLine | Chiltern Main Line ⓘ |
| usedOnRoute |
London Marylebone to Aylesbury
ⓘ
linked to:
London Marylebone – Aylesbury
London Marylebone to Banbury ⓘ
linked to:
London Marylebone – Banbury
London Marylebone to Birmingham ⓘ |
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 168 Description of subject: 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.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.