SP 4245
E662829
SP 4245 is a Southern Pacific Railroad EMD AC-11 class articulated steam locomotive, part of a series of powerful cab-forward engines used primarily for heavy freight service over mountainous routes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SP 4245 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7429179 — 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: SP 4245 Context triple: [AC-11, fleetNumbers, SP 4245]
-
A.
SR 427
SR 427 is a Nevada state highway that serves as a connector route in the western part of the state, linking local communities and major roadways.
-
B.
S-44
S-44 is an International Hydrographic Organization standard that defines the accuracy and quality requirements for hydrographic surveys used in nautical charting and marine navigation.
-
C.
S42 line
The S42 line is a regional commuter rail service within the Zürich S-Bahn network, connecting suburban areas with the greater Zürich metropolitan region.
-
D.
S45 line
The S45 line is a Berlin S-Bahn route that connects the city's southeastern districts, including the airport area, with the wider urban rail network.
-
E.
FR-42
FR-42 is the ISO 3166-2 code designating the Loire department in central-eastern France.
- 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: SP 4245 Target entity description: SP 4245 is a Southern Pacific Railroad EMD AC-11 class articulated steam locomotive, part of a series of powerful cab-forward engines used primarily for heavy freight service over mountainous routes.
-
A.
SR 427
SR 427 is a Nevada state highway that serves as a connector route in the western part of the state, linking local communities and major roadways.
-
B.
S-44
S-44 is an International Hydrographic Organization standard that defines the accuracy and quality requirements for hydrographic surveys used in nautical charting and marine navigation.
-
C.
S42 line
The S42 line is a regional commuter rail service within the Zürich S-Bahn network, connecting suburban areas with the greater Zürich metropolitan region.
-
D.
S45 line
The S45 line is a Berlin S-Bahn route that connects the city's southeastern districts, including the airport area, with the wider urban rail network.
-
E.
FR-42
FR-42 is the ISO 3166-2 code designating the Loire department in central-eastern France.
- F. None of above. chosen
Statements (28)
| Predicate | Object |
|---|---|
| instanceOf |
Southern Pacific Railroad locomotive
ⓘ
steam locomotive ⓘ |
| configuration | 4-8-8-2 ⓘ |
| countryOfOperation |
United States of America
ⓘ
surface form:
United States
|
| designFeature |
articulated frame
ⓘ
cab-forward design ⓘ |
| era | steam era ⓘ |
| fuelType | bunker oil ⓘ |
| gauge | standard gauge ⓘ |
| hasArticulation | Mallet-type articulation ⓘ |
| locomotiveClass | Southern Pacific AC-11 NERFINISHED ⓘ |
| manufacturer | Baldwin Locomotive Works NERFINISHED ⓘ |
| notableCharacteristic |
cab located at front of locomotive
ⓘ
designed to improve crew safety in tunnels and snow sheds ⓘ |
| operator | Southern Pacific Railroad NERFINISHED ⓘ |
| partOf | Southern Pacific AC cab-forward locomotive fleet NERFINISHED ⓘ |
| powerType | steam ⓘ |
| primaryUse |
heavy freight service
ⓘ
mountainous route operations ⓘ |
| railroad | Southern Pacific NERFINISHED ⓘ |
| railwayCompany | Southern Pacific Transportation Company NERFINISHED ⓘ |
| railwayLineUsed | Southern Pacific Railroad network NERFINISHED ⓘ |
| series | Southern Pacific AC-11 class NERFINISHED ⓘ |
| trackGauge | 4 ft 8 1⁄2 in ⓘ |
| UICClassification | (2′D)D2′ h4 ⓘ |
| usedFor | long-haul freight trains ⓘ |
| usedOn | mountain grades of the Southern Pacific ⓘ |
| wheelArrangement | 4-8-8-2 ⓘ |
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: SP 4245 Description of subject: SP 4245 is a Southern Pacific Railroad EMD AC-11 class articulated steam locomotive, part of a series of powerful cab-forward engines used primarily for heavy freight service over mountainous routes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.