B Class steam locomotives
E635049
The B Class steam locomotives are small, narrow-gauge tank engines historically used on the Darjeeling Himalayan Railway, renowned for hauling trains through the steep, winding mountain route in the Indian Himalayas.
All labels observed (1)
| Label | Occurrences |
|---|---|
| B Class steam locomotives canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7015407 — 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: B Class steam locomotives Context triple: [Darjeeling Himalayan Railway, notableLocomotiveClass, B Class steam locomotives]
-
A.
BR Standard Class 4 steam locomotives
BR Standard Class 4 steam locomotives are mid-20th-century British Railways mixed-traffic steam engines designed for versatility and efficiency on both passenger and freight services.
-
B.
Class 68 locomotive
The Class 68 locomotive is a modern British diesel-electric locomotive used for passenger and freight services, known for its high performance, reliability, and distinctive angular design.
-
C.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
-
D.
Lion steam locomotive
The Lion steam locomotive is a preserved early 19th-century British steam engine famed for its role in the Liverpool and Manchester Railway and as one of the oldest surviving working locomotives.
-
E.
LMS Stanier Class 5 4-6-0 "Black Five" locomotives
The LMS Stanier Class 5 4-6-0 "Black Five" locomotives are a highly successful and versatile class of British mixed-traffic steam engines designed by William Stanier for the London, Midland and Scottish Railway in the 1930s.
- 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: B Class steam locomotives Target entity description: The B Class steam locomotives are small, narrow-gauge tank engines historically used on the Darjeeling Himalayan Railway, renowned for hauling trains through the steep, winding mountain route in the Indian Himalayas.
-
A.
BR Standard Class 4 steam locomotives
BR Standard Class 4 steam locomotives are mid-20th-century British Railways mixed-traffic steam engines designed for versatility and efficiency on both passenger and freight services.
-
B.
Class 68 locomotive
The Class 68 locomotive is a modern British diesel-electric locomotive used for passenger and freight services, known for its high performance, reliability, and distinctive angular design.
-
C.
Forney locomotive
The Forney locomotive is a compact 19th-century steam tank locomotive type, notable for its rigid wheelbase and rear-mounted fuel and water tanks, widely used on urban elevated and commuter railways.
-
D.
Lion steam locomotive
The Lion steam locomotive is a preserved early 19th-century British steam engine famed for its role in the Liverpool and Manchester Railway and as one of the oldest surviving working locomotives.
-
E.
LMS Stanier Class 5 4-6-0 "Black Five" locomotives
The LMS Stanier Class 5 4-6-0 "Black Five" locomotives are a highly successful and versatile class of British mixed-traffic steam engines designed by William Stanier for the London, Midland and Scottish Railway in the 1930s.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
narrow-gauge tank locomotive
ⓘ
steam locomotive class ⓘ |
| associatedWith |
Darjeeling town
NERFINISHED
ⓘ
Toy Train of Darjeeling Himalayan Railway NERFINISHED ⓘ |
| brakeType | vacuum brake ⓘ |
| configuration |
0-4-0
ⓘ
0-4-0ST ⓘ |
| country | India ⓘ |
| culturalSignificance |
iconic symbol of Darjeeling Himalayan Railway
ⓘ
part of Indian railway heritage ⓘ |
| designedFor |
hauling light trains on steep gradients
ⓘ
narrow-gauge mountain railway operations ⓘ |
| environment | steep mountain railway ⓘ |
| fuelType | coal ⓘ |
| gauge |
2 ft
ⓘ
610 mm ⓘ |
| heritageStatus | associated with UNESCO World Heritage Site ⓘ |
| location | West Bengal NERFINISHED ⓘ |
| notableFeature |
ability to negotiate very tight curves
ⓘ
small size suitable for tight clearances ⓘ tank locomotive with onboard water tanks ⓘ |
| notableFor |
operation on sharp curves
ⓘ
operation on steep gradients ⓘ use on Darjeeling Himalayan Railway UNESCO World Heritage route ⓘ |
| operator |
Darjeeling Himalayan Railway
NERFINISHED
ⓘ
Indian Railways NERFINISHED ⓘ Northeast Frontier Railway zone NERFINISHED ⓘ |
| powerType | steam ⓘ |
| primaryRole |
hill section banking and hauling
ⓘ
mountain passenger service ⓘ |
| railwayLine | New Jalpaiguri–Darjeeling line NERFINISHED ⓘ |
| railwaySystem | Darjeeling Himalayan Railway system NERFINISHED ⓘ |
| region | Indian Himalayas NERFINISHED ⓘ |
| status |
some units operational in heritage service
ⓘ
some units preserved ⓘ |
| tourismImportance | major attraction for rail enthusiasts ⓘ |
| trackType | narrow gauge ⓘ |
| tractionType | adhesion ⓘ |
| usedFor |
heritage services
ⓘ
regular passenger services on hill section ⓘ tourist trains ⓘ |
| usedOn | Darjeeling Himalayan Railway NERFINISHED ⓘ |
| usedOnSection | Siliguri–Darjeeling hill section NERFINISHED ⓘ |
| usedSince | late 19th century ⓘ |
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: B Class steam locomotives Description of subject: The B Class steam locomotives are small, narrow-gauge tank engines historically used on the Darjeeling Himalayan Railway, renowned for hauling trains through the steep, winding mountain route in the Indian Himalayas.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.