Norfolk and Western Class A
E387453
Norfolk and Western Class A was a series of powerful articulated steam locomotives built for high-speed freight service on the Norfolk and Western Railway in the mid-20th century.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Norfolk and Western 1218 | 1 |
| Norfolk and Western Class A canonical | 1 |
| Norfolk and Western Class Y | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3773200 — 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: Norfolk and Western Class A Context triple: [Norfolk and Western Railway, notableLocomotiveClass, Norfolk and Western Class A]
-
A.
Norfolk and Western Class J
The Norfolk and Western Class J was a famed series of streamlined 4-8-4 steam locomotives renowned for their power, efficiency, and elegant design, used primarily for high-speed passenger service in the mid-20th century United States.
-
B.
EMD GP40-2H
The EMD GP40-2H is a rebuilt, passenger-equipped variant of the EMD GP40-2 diesel-electric locomotive, featuring head-end power for commuter rail service.
-
C.
WM Class I-2 2-10-0
WM Class I-2 2-10-0 was a powerful Decapod-type steam locomotive class used by the Western Maryland Railway primarily for heavy freight service over steep grades.
-
D.
Atchison Topeka and Santa Fe 4-8-4 locomotive
The Atchison, Topeka and Santa Fe 4-8-4 locomotive is a powerful steam engine from the famed Santa Fe Railway, known for hauling high-speed passenger and heavy freight trains across the American West in the mid-20th century.
-
E.
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.
- 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: Norfolk and Western Class A Target entity description: Norfolk and Western Class A was a series of powerful articulated steam locomotives built for high-speed freight service on the Norfolk and Western Railway in the mid-20th century.
-
A.
Norfolk and Western Class J
The Norfolk and Western Class J was a famed series of streamlined 4-8-4 steam locomotives renowned for their power, efficiency, and elegant design, used primarily for high-speed passenger service in the mid-20th century United States.
-
B.
EMD GP40-2H
The EMD GP40-2H is a rebuilt, passenger-equipped variant of the EMD GP40-2 diesel-electric locomotive, featuring head-end power for commuter rail service.
-
C.
WM Class I-2 2-10-0
WM Class I-2 2-10-0 was a powerful Decapod-type steam locomotive class used by the Western Maryland Railway primarily for heavy freight service over steep grades.
-
D.
Atchison Topeka and Santa Fe 4-8-4 locomotive
The Atchison, Topeka and Santa Fe 4-8-4 locomotive is a powerful steam engine from the famed Santa Fe Railway, known for hauling high-speed passenger and heavy freight trains across the American West in the mid-20th century.
-
E.
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.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
articulated locomotive class
ⓘ
steam locomotive class ⓘ |
| boilerPressure |
2.07 MPa
ⓘ
300 psi ⓘ |
| buildEndDate | 1950 ⓘ |
| builder |
Roanoke Shops
ⓘ
surface form:
Norfolk and Western Railway Roanoke Shops
|
| buildPeriod | 1936–1950 ⓘ |
| buildPlace | Roanoke, Virginia ⓘ |
| buildStartDate | 1936 ⓘ |
| configuration | simple articulated ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| cylinderArrangement | two outside high-pressure cylinders and two inside low-pressure cylinders ⓘ |
| cylinderCount | 4 ⓘ |
| designer |
Roanoke Shops
ⓘ
surface form:
Norfolk and Western Railway Roanoke Shops
|
| disposition | most units scrapped ⓘ |
| driverDiameter |
1,778 mm
ⓘ
70 in ⓘ |
| enteredService | 1936 ⓘ |
| era | mid-20th century ⓘ |
| fuelType | coal ⓘ |
| maximumSpeed |
113 km/h
ⓘ
70 mph ⓘ |
| notableFor |
ability to haul heavy coal trains at high speed
ⓘ
high power-to-weight ratio ⓘ |
| notableUnit |
Norfolk and Western Class A
self-linksurface differs
ⓘ
surface form:
Norfolk and Western 1218
|
| operator | Norfolk and Western Railway ⓘ |
| powerType | steam ⓘ |
| preservedAt | Virginia Museum of Transportation ⓘ |
| preservedLocation | Roanoke, Virginia ⓘ |
| preservedUnits | 1 ⓘ |
| primaryRole | high-speed freight service ⓘ |
| railGauge |
1,435 mm
ⓘ
4 ft 8 1⁄2 in ⓘ |
| railwayCompany | Norfolk and Western Railway ⓘ |
| railwayRegion |
Appalachian coalfield
ⓘ
surface form:
Appalachian coal fields
|
| relatedClass |
Norfolk and Western Class J
ⓘ
Norfolk and Western Y class ⓘ |
| retirementEndDate | early 1960s ⓘ |
| retirementStartDate | late 1950s ⓘ |
| successorTractionType | diesel-electric locomotives ⓘ |
| totalProduced | 43 ⓘ |
| tractiveEffort |
114,000 lbf
ⓘ
507 kN ⓘ |
| UICClassification | (1′C)(C1′) h4 ⓘ |
| usedFor |
coal trains
ⓘ
manifest freight trains ⓘ |
| usedOn | Norfolk and Western mainline freight trains ⓘ |
| valveGear | Baker valve gear ⓘ |
| wheelArrangement | 2-6-6-4 ⓘ |
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: Norfolk and Western Class A Description of subject: Norfolk and Western Class A was a series of powerful articulated steam locomotives built for high-speed freight service on the Norfolk and Western Railway in the mid-20th century.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Norfolk and Western Class Y
this entity surface form:
Norfolk and Western 1218