British Rail Class 172
E146566
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.
All labels observed (5)
| Label | Occurrences |
|---|---|
| British Rail Class 172 canonical | 2 |
| British Rail Class 172/0 | 1 |
| British Rail Class 172/1 | 1 |
| British Rail Class 172/2 | 1 |
| British Rail Class 172/3 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1140368 — 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 172 Context triple: [British Rail Class 170, successor, British Rail Class 172]
-
A.
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.
-
B.
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.
-
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 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.
-
E.
Class 379 Electrostar
The Class 379 Electrostar is a British electric multiple-unit train type built by Bombardier for high-frequency commuter and airport services, known for its modern design and passenger comfort.
- 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 172 Target entity description: 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.
-
A.
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.
-
B.
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.
-
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 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.
-
E.
Class 379 Electrostar
The Class 379 Electrostar is a British electric multiple-unit train type built by Bombardier for high-frequency commuter and airport services, known for its modern design and passenger comfort.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Turbostar family train
ⓘ
diesel multiple unit ⓘ passenger train ⓘ |
| brakingSystem | air brakes ⓘ |
| builder | Bombardier Transportation Derby Litchurch Lane Works ⓘ |
| countryOfOperation | United Kingdom ⓘ |
| designedFor |
commuter services
ⓘ
regional services ⓘ suburban services ⓘ |
| enteredService | 2010 ⓘ |
| family | Bombardier Turbostar ⓘ |
| formation |
2-car units
ⓘ
3-car units ⓘ |
| hasFeature |
CCTV
ⓘ
accessible toilets ⓘ air conditioning ⓘ enhanced passenger comfort ⓘ high-back seating ⓘ improved acceleration ⓘ improved reliability ⓘ luggage racks ⓘ passenger information system ⓘ priority seating ⓘ wide doors for rapid boarding ⓘ |
| hasSubclass |
British Rail Class 172
self-linksurface differs
ⓘ
surface form:
British Rail Class 172/0
British Rail Class 172 self-linksurface differs ⓘ
surface form:
British Rail Class 172/1
British Rail Class 172 self-linksurface differs ⓘ
surface form:
British Rail Class 172/2
British Rail Class 172 self-linksurface differs ⓘ
surface form:
British Rail Class 172/3
|
| improvedOver | British Rail Class 170 ⓘ |
| introduced | 2010 ⓘ |
| manufacturer |
Bombardier
ⓘ
surface form:
Bombardier Transportation
|
| multipleWorking | compatible with other Turbostar units ⓘ |
| operator |
Chiltern Railways
ⓘ
London Overground ⓘ West Midlands Railway ⓘ previously London Midland ⓘ |
| powerType | diesel ⓘ |
| propulsion | diesel engine with mechanical or diesel-hydraulic transmission ⓘ |
| serviceType |
semi-fast services
ⓘ
stopping services ⓘ |
| trackGauge | standard gauge ⓘ |
| usedFor |
commuter rail services
ⓘ
regional passenger transport ⓘ suburban passenger transport ⓘ |
| usedOn |
regional rail lines in the West Midlands
ⓘ
suburban rail lines in London ⓘ |
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 172 Description of subject: 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.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
British Rail Class 170
this entity surface form:
British Rail Class 172/0
this entity surface form:
British Rail Class 172/1
this entity surface form:
British Rail Class 172/2
this entity surface form:
British Rail Class 172/3