K4s Pacific
E12064
The K4s Pacific was a renowned class of 4-6-2 steam locomotives that served as the primary passenger power for the Pennsylvania Railroad in the first half of the 20th century.
All labels observed (2)
| Label | Occurrences |
|---|---|
| K4s | 1 |
| K4s Pacific canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T21913 — 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: K4s Pacific Context triple: [Pennsylvania Railroad Company, notableLocomotiveClass, K4s Pacific]
-
A.
Hiryū
Hiryū was a Japanese aircraft carrier of the Imperial Japanese Navy, best known for its crucial role and eventual sinking during the Battle of Midway in World War II.
-
B.
Pan Pacific Defense Corps
The Pan Pacific Defense Corps is a multinational military organization in the "Pacific Rim" universe responsible for developing and deploying giant Jaeger robots to combat monstrous Kaiju threats.
-
C.
Kaga
Kaga was a Japanese aircraft carrier of the Imperial Japanese Navy that played a major role in early Pacific War operations before being sunk at the Battle of Midway in 1942.
-
D.
Akagi
Akagi was a prominent Imperial Japanese Navy aircraft carrier that played a major role in early Pacific War operations before being sunk during World War II.
-
E.
Imperial Japanese Navy
The Imperial Japanese Navy was the maritime military force of the Empire of Japan, renowned for its powerful carrier fleet and major role in naval battles across the Pacific during World War II.
- 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: K4s Pacific Target entity description: The K4s Pacific was a renowned class of 4-6-2 steam locomotives that served as the primary passenger power for the Pennsylvania Railroad in the first half of the 20th century.
-
A.
Hiryū
Hiryū was a Japanese aircraft carrier of the Imperial Japanese Navy, best known for its crucial role and eventual sinking during the Battle of Midway in World War II.
-
B.
Pan Pacific Defense Corps
The Pan Pacific Defense Corps is a multinational military organization in the "Pacific Rim" universe responsible for developing and deploying giant Jaeger robots to combat monstrous Kaiju threats.
-
C.
Kaga
Kaga was a Japanese aircraft carrier of the Imperial Japanese Navy that played a major role in early Pacific War operations before being sunk at the Battle of Midway in 1942.
-
D.
Akagi
Akagi was a prominent Imperial Japanese Navy aircraft carrier that played a major role in early Pacific War operations before being sunk during World War II.
-
E.
Imperial Japanese Navy
The Imperial Japanese Navy was the maritime military force of the Empire of Japan, renowned for its powerful carrier fleet and major role in naval battles across the Pacific during World War II.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
4-6-2 Pacific-type locomotive
ⓘ
steam locomotive class ⓘ |
| boilerPressure | 205 psi ⓘ |
| buildDateEnd | 1928 ⓘ |
| buildDateStart | 1914 ⓘ |
| configuration |
leading truck with two axles
ⓘ
one trailing axle under firebox ⓘ three coupled driving axles ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| cylinderArrangement | outside cylinders ⓘ |
| cylinderCount | 2 ⓘ |
| designer |
Pennsylvania Railroad Altoona Works
ⓘ
Pennsylvania Railroad Company ⓘ
surface form:
Pennsylvania Railroad mechanical department
|
| driverDiameter | 80 in ⓘ |
| famousExample |
PRR K4s
ⓘ
surface form:
PRR 1361
PRR K4s ⓘ
surface form:
PRR 3750
|
| fuelType | coal ⓘ |
| gauge | 4 ft 8 1⁄2 in standard gauge ⓘ |
| introduced | 1914 ⓘ |
| mainServicePeriod | first half of the 20th century ⓘ |
| notableFor |
being the standard passenger locomotive of the Pennsylvania Railroad
ⓘ
large production run for a single US passenger locomotive class ⓘ |
| notableRoute |
Main Line (Philadelphia to Pittsburgh)
ⓘ
surface form:
Pennsylvania Railroad main line between New York and Chicago
New York–St. Louis route ⓘ
surface form:
Pennsylvania Railroad main line between New York and St. Louis
|
| operator |
Pennsylvania Railroad Company
ⓘ
surface form:
Pennsylvania Railroad
Pennsylvania Railroad Lines East ⓘ Pennsylvania Railroad Lines East ⓘ
surface form:
Pennsylvania Railroad Lines West
|
| powerType | steam ⓘ |
| precededByClass |
PRR K4s
ⓘ
surface form:
PRR K2
PRR K4s ⓘ
surface form:
PRR K3
|
| preservedAt |
Railroad Museum of Pennsylvania, Strasburg, Pennsylvania
ⓘ
Railroaders Memorial Museum, Altoona, Pennsylvania ⓘ |
| preservedUnits | 2 ⓘ |
| primaryUse | passenger service ⓘ |
| railGauge | 1,435 mm ⓘ |
| railroadClass | PRR K4s ⓘ |
| railway |
Pennsylvania Railroad Company
ⓘ
surface form:
Pennsylvania Railroad
|
| railwayRegion | Northeastern United States ⓘ |
| replacedBy | diesel-electric locomotives ⓘ |
| retirementPeriod | 1950s ⓘ |
| succeededByClass | PRR T1 ⓘ |
| totalProduced | 425 ⓘ |
| tractiveEffort | about 44,460 lbf ⓘ |
| UICClassification | 2′C1′ h ⓘ |
| usedFor |
commuter passenger trains
ⓘ
express passenger trains ⓘ |
| wheelArrangement | 4-6-2 ⓘ |
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: K4s Pacific Description of subject: The K4s Pacific was a renowned class of 4-6-2 steam locomotives that served as the primary passenger power for the Pennsylvania Railroad in the first half of the 20th century.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
K4s