LNER Class P2
E211420
The LNER Class P2 was a powerful class of 2-8-2 steam locomotives designed by Sir Nigel Gresley for hauling heavy express trains on the challenging Edinburgh–Aberdeen route in the 1930s.
All labels observed (3)
| Label | Occurrences |
|---|---|
| LNER Class A2/2 | 1 |
| LNER Class P2 canonical | 1 |
| LNER Class P2 steam locomotive | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1746645 — 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: LNER Class P2 Context triple: [London and North Eastern Railway, notableLocomotiveClass, LNER Class P2]
-
A.
LNER Class V2
The LNER Class V2 was a class of powerful 2-6-2 steam locomotives designed by Sir Nigel Gresley for mixed-traffic duties on the London and North Eastern Railway in the mid-20th century.
-
B.
LMS Jubilee Class
The LMS Jubilee Class was a class of British steam locomotives built in the 1930s for express passenger services on the London, Midland and Scottish Railway.
-
C.
LNER Class A1
The LNER Class A1 was a series of powerful British express passenger steam locomotives designed by Sir Nigel Gresley for high-speed mainline services in the early 20th century.
-
D.
LNER Class A3
The LNER Class A3 was a famous class of British express steam locomotives, including the record-breaking Flying Scotsman, designed by Sir Nigel Gresley for high-speed mainline passenger service.
-
E.
LNER Class A3 4472 Flying Scotsman
LNER Class A3 4472 Flying Scotsman is a famous British steam locomotive renowned for being one of the world’s most iconic express passenger engines and the first to officially reach 100 mph.
- 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: LNER Class P2 Target entity description: The LNER Class P2 was a powerful class of 2-8-2 steam locomotives designed by Sir Nigel Gresley for hauling heavy express trains on the challenging Edinburgh–Aberdeen route in the 1930s.
-
A.
LNER Class V2
The LNER Class V2 was a class of powerful 2-6-2 steam locomotives designed by Sir Nigel Gresley for mixed-traffic duties on the London and North Eastern Railway in the mid-20th century.
-
B.
LMS Jubilee Class
The LMS Jubilee Class was a class of British steam locomotives built in the 1930s for express passenger services on the London, Midland and Scottish Railway.
-
C.
LNER Class A1
The LNER Class A1 was a series of powerful British express passenger steam locomotives designed by Sir Nigel Gresley for high-speed mainline services in the early 20th century.
-
D.
LNER Class A3
The LNER Class A3 was a famous class of British express steam locomotives, including the record-breaking Flying Scotsman, designed by Sir Nigel Gresley for high-speed mainline passenger service.
-
E.
LNER Class A3 4472 Flying Scotsman
LNER Class A3 4472 Flying Scotsman is a famous British steam locomotive renowned for being one of the world’s most iconic express passenger engines and the first to officially reach 100 mph.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
2-8-2 locomotive
ⓘ
British steam locomotive ⓘ express passenger locomotive ⓘ steam locomotive class ⓘ |
| boilerPressure | 220 psi ⓘ |
| buildPeriod | 1934–1936 ⓘ |
| configuration | Mikado ⓘ |
| countryOfOperation | United Kingdom ⓘ |
| cylinderArrangement | three-cylinder ⓘ |
| cylinderCount | 3 ⓘ |
| designedByRole |
Nigel Gresley
ⓘ
surface form:
LNER Chief Mechanical Engineer
|
| designedFor |
Scottish main line gradients and curves
ⓘ
curving performance with pony truck and Cartazzi trailing axle ⓘ hauling heavy express trains ⓘ |
| designer |
Nigel Gresley
ⓘ
surface form:
Sir Nigel Gresley
|
| era | 1930s ⓘ |
| firstLocomotiveName | Cock o’ the North ⓘ |
| firstLocomotiveNumber | 2001 ⓘ |
| fuelType | coal ⓘ |
| gauge | standard gauge ⓘ |
| heritageProject | new-build P2 No. 2007 Prince of Wales ⓘ |
| heritageProjectOperator | A1 Steam Locomotive Trust ⓘ |
| historicalStatus | all originals rebuilt and scrapped ⓘ |
| introduced | 1934 ⓘ |
| notableFeature |
large boiler for high power output
ⓘ
long rigid wheelbase ⓘ streamlined front end on later members ⓘ |
| notableFor | being among the most powerful express passenger steam locomotives in the UK ⓘ |
| numberBuilt | 6 ⓘ |
| operatedBy | London and North Eastern Railway ⓘ |
| operator |
London and North Eastern Railway
ⓘ
surface form:
LNER
|
| originalDesignVariant | P2/1 design ⓘ |
| powerType | steam ⓘ |
| primaryRoute |
Edinburgh to Aberdeen line
ⓘ
surface form:
Aberdeen–Edinburgh line
Edinburgh to Aberdeen line ⓘ
surface form:
Edinburgh–Aberdeen line
|
| railwayCompany |
London and North Eastern Railway
ⓘ
surface form:
LNER
|
| railwayRegion |
British Railways Scottish Region
ⓘ
surface form:
LNER Scottish Area
|
| reasonForRebuild | poor route availability and mechanical reliability issues ⓘ |
| rebuilder | Edward Thompson ⓘ |
| rebuilderRole |
Nigel Gresley
ⓘ
surface form:
LNER Chief Mechanical Engineer
|
| rebuiltAs |
LNER Class P2
self-linksurface differs
ⓘ
surface form:
LNER Class A2/2
|
| region | Scotland ⓘ |
| serviceType | express passenger ⓘ |
| subsequentDesignVariant | streamlined P2/2 design ⓘ |
| trackGauge | 1435 mm ⓘ |
| UICClassification | 1′D1′ h3 ⓘ |
| valveGear |
Gresley conjugated
ⓘ
Walschaerts ⓘ |
| wheelArrangement | 2-8-2 ⓘ |
| withdrawn | 1944 ⓘ |
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: LNER Class P2 Description of subject: The LNER Class P2 was a powerful class of 2-8-2 steam locomotives designed by Sir Nigel Gresley for hauling heavy express trains on the challenging Edinburgh–Aberdeen route in the 1930s.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
LNER Class A2/2
this entity surface form:
LNER Class P2 steam locomotive