Southern Pacific GS-4
E504061
4-8-4 locomotive
Northern-type locomotive
Southern Pacific GS-4 locomotive
steam locomotive class
streamlined locomotive
The Southern Pacific GS-4 is a class of streamlined 4-8-4 "Northern" steam locomotives built in the 1940s for the Southern Pacific Railroad, renowned for their distinctive orange and red "Daylight" livery and high-speed passenger service.
All labels observed (2)
| Label | Occurrences |
|---|---|
| GS-4 4-8-4 steam locomotives | 1 |
| Southern Pacific GS-4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5219811 — 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: Southern Pacific GS-4 Context triple: [Coast Daylight, locomotiveClassUsed, Southern Pacific GS-4]
-
A.
Southern Pacific Cab Forward locomotive
The Southern Pacific Cab Forward locomotive is a distinctive class of steam engines with the cab placed at the front for crew safety, famously used by the Southern Pacific Railroad to haul trains through long, smoky mountain tunnels and snow sheds in the American West.
-
B.
Union Pacific Challenger
The Union Pacific Challenger was a named passenger train operated by the Union Pacific Railroad, known for providing comfortable, mid-priced long-distance service across the western United States.
-
C.
Union Pacific Heritage Fleet
The Union Pacific Heritage Fleet is a collection of restored historic passenger cars and locomotives maintained by Union Pacific Railroad for special excursions, public relations, and preservation of the company’s railroading legacy.
-
D.
Union Pacific No. 119
Union Pacific No. 119 was the steam locomotive that represented the Union Pacific Railroad at the 1869 Golden Spike ceremony marking the completion of the First Transcontinental Railroad.
-
E.
Standard Passenger Pacific of the PRR
The "Standard Passenger Pacific of the PRR" refers to the Pennsylvania Railroad’s K4s class, a highly successful and iconic 4-6-2 steam locomotive that became the railroad’s primary passenger engine in the early to mid-20th century.
- 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: Southern Pacific GS-4 Target entity description: The Southern Pacific GS-4 is a class of streamlined 4-8-4 "Northern" steam locomotives built in the 1940s for the Southern Pacific Railroad, renowned for their distinctive orange and red "Daylight" livery and high-speed passenger service.
-
A.
Southern Pacific Cab Forward locomotive
The Southern Pacific Cab Forward locomotive is a distinctive class of steam engines with the cab placed at the front for crew safety, famously used by the Southern Pacific Railroad to haul trains through long, smoky mountain tunnels and snow sheds in the American West.
-
B.
Union Pacific Challenger
The Union Pacific Challenger was a named passenger train operated by the Union Pacific Railroad, known for providing comfortable, mid-priced long-distance service across the western United States.
-
C.
Union Pacific Heritage Fleet
The Union Pacific Heritage Fleet is a collection of restored historic passenger cars and locomotives maintained by Union Pacific Railroad for special excursions, public relations, and preservation of the company’s railroading legacy.
-
D.
Union Pacific No. 119
Union Pacific No. 119 was the steam locomotive that represented the Union Pacific Railroad at the 1869 Golden Spike ceremony marking the completion of the First Transcontinental Railroad.
-
E.
Standard Passenger Pacific of the PRR
The "Standard Passenger Pacific of the PRR" refers to the Pennsylvania Railroad’s K4s class, a highly successful and iconic 4-6-2 steam locomotive that became the railroad’s primary passenger engine in the early to mid-20th century.
- F. None of above. chosen
Statements (59)
| Predicate | Object |
|---|---|
| instanceOf |
4-8-4 locomotive
ⓘ
Northern-type locomotive ⓘ Southern Pacific GS-4 locomotive ⓘ steam locomotive class ⓘ streamlined locomotive ⓘ |
| brakeType | air ⓘ |
| buildDate |
1941
ⓘ
1942 ⓘ |
| builder | Lima Locomotive Works NERFINISHED ⓘ |
| configuration | 4-8-4 ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| cylinderConfiguration | simple expansion ⓘ |
| cylinderCount | 2 ⓘ |
| designedForService | high-speed passenger trains ⓘ |
| designer | Southern Pacific Railroad Mechanical Department NERFINISHED ⓘ |
| driverDiameter | 80 in ⓘ |
| fleetNumbers |
SP 4439
NERFINISHED
ⓘ
SP 4440 NERFINISHED ⓘ SP 4441 NERFINISHED ⓘ SP 4442 NERFINISHED ⓘ SP 4443 NERFINISHED ⓘ SP 4444 NERFINISHED ⓘ SP 4445 NERFINISHED ⓘ SP 4446 NERFINISHED ⓘ SP 4447 NERFINISHED ⓘ SP 4448 NERFINISHED ⓘ SP 4449 NERFINISHED ⓘ SP 4450 NERFINISHED ⓘ SP 4451 NERFINISHED ⓘ SP 4452 NERFINISHED ⓘ SP 4453 NERFINISHED ⓘ SP 4454 NERFINISHED ⓘ SP 4455 NERFINISHED ⓘ SP 4456 NERFINISHED ⓘ SP 4457 NERFINISHED ⓘ SP 4458 NERFINISHED ⓘ SP 4459 NERFINISHED ⓘ |
| fuelType | fuel oil ⓘ |
| gauge | 4 ft 8 1⁄2 in standard gauge ⓘ |
| livery | Daylight ⓘ |
| liveryColors |
black
ⓘ
orange ⓘ red ⓘ |
| location | Oregon Rail Heritage Center, Portland, Oregon NERFINISHED ⓘ |
| notableTrain |
Coast Daylight
NERFINISHED
ⓘ
San Joaquin Daylight NERFINISHED ⓘ Shasta Daylight NERFINISHED ⓘ |
| operator | Southern Pacific Railroad NERFINISHED ⓘ |
| powerType | steam ⓘ |
| preservedUnits | SP 4449 NERFINISHED ⓘ |
| primaryUse | passenger service ⓘ |
| retirementDate | 1950s ⓘ |
| status | preserved ⓘ |
| totalProduced | 28 ⓘ |
| trainHeating | steam ⓘ |
| UICClassification | 2′D2′ h2 ⓘ |
| use | excursion service ⓘ |
| valveGear | Walschaerts ⓘ |
| wheelArrangementName | Northern ⓘ |
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: Southern Pacific GS-4 Description of subject: The Southern Pacific GS-4 is a class of streamlined 4-8-4 "Northern" steam locomotives built in the 1940s for the Southern Pacific Railroad, renowned for their distinctive orange and red "Daylight" livery and high-speed passenger service.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Southern Pacific Railroad
this entity surface form:
GS-4 4-8-4 steam locomotives