PRR K4s
E76330
The PRR K4s was a class of iconic 4-6-2 "Pacific" steam locomotives that served as the primary passenger power for the Pennsylvania Railroad in the first half of the 20th century.
All labels observed (9)
| Label | Occurrences |
|---|---|
| PRR 3750 | 3 |
| PRR 1361 | 2 |
| PRR K4s canonical | 2 |
| PRR K2 | 1 |
| PRR K3 | 1 |
| PRR K4s Pacific | 1 |
| Pennsylvania Railroad K3 class | 1 |
| Pennsylvania Railroad K4s class | 1 |
| Pennsylvania Railroad K4s class locomotives | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T609463 — 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: PRR K4s Context triple: [K4s Pacific, railroadClass, PRR K4s]
-
A.
GG1 electric locomotive
The GG1 electric locomotive was a streamlined, high-speed electric locomotive class that became an iconic workhorse of American railroading, particularly in the Northeast corridor, during much of the 20th century.
-
B.
EMD F59PHI
The EMD F59PHI is a streamlined diesel-electric passenger locomotive widely used in North American intercity and commuter rail services.
-
C.
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.
-
D.
DE30AC locomotive
The DE30AC locomotive is a diesel-electric passenger locomotive built by EMD for the Long Island Rail Road, designed for push-pull commuter service with head-end power.
-
E.
Siemens ACS-64
The Siemens ACS-64 is a high-speed, electric locomotive used by Amtrak for passenger rail service in the United States.
- 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: PRR K4s Target entity description: The PRR K4s was a class of iconic 4-6-2 "Pacific" steam locomotives that served as the primary passenger power for the Pennsylvania Railroad in the first half of the 20th century.
-
A.
GG1 electric locomotive
The GG1 electric locomotive was a streamlined, high-speed electric locomotive class that became an iconic workhorse of American railroading, particularly in the Northeast corridor, during much of the 20th century.
-
B.
EMD F59PHI
The EMD F59PHI is a streamlined diesel-electric passenger locomotive widely used in North American intercity and commuter rail services.
-
C.
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.
-
D.
DE30AC locomotive
The DE30AC locomotive is a diesel-electric passenger locomotive built by EMD for the Long Island Rail Road, designed for push-pull commuter service with head-end power.
-
E.
Siemens ACS-64
The Siemens ACS-64 is a high-speed, electric locomotive used by Amtrak for passenger rail service in the United States.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
4-6-2 Pacific-type locomotive
ⓘ
steam locomotive class ⓘ |
| boilerPressure | 205 psi ⓘ |
| boilerType | fire-tube boiler ⓘ |
| brakeType | air brakes ⓘ |
| buildDateEnd | 1928 ⓘ |
| buildDateStart | 1914 ⓘ |
| configurationName | Pacific ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| cylinderConfiguration | simple expansion ⓘ |
| cylinderCount | 2 ⓘ |
| designer |
Pennsylvania Railroad Altoona Works
ⓘ
surface form:
Altoona Works mechanical engineering department
Pennsylvania Railroad Altoona Works ⓘ |
| driverDiameter | 80 in ⓘ |
| era | first half of the 20th century ⓘ |
| frameType | conventional bar frame ⓘ |
| fuelType | coal ⓘ |
| gauge | 4 ft 8 1⁄2 in standard gauge ⓘ |
| heritage | symbol of Pennsylvania Railroad passenger era ⓘ |
| nickname | Standard Passenger Pacific of the PRR ⓘ |
| notableFor |
being the standard passenger locomotive of the Pennsylvania Railroad
ⓘ
iconic status in American steam locomotive history ⓘ |
| operator |
Pennsylvania Railroad Company
ⓘ
surface form:
Pennsylvania Railroad
|
| powerType | steam ⓘ |
| precededByClass |
PRR K2
ⓘ
PRR K2 ⓘ
surface form:
PRR K3
|
| preservedAt |
Railroad Museum of Pennsylvania, Strasburg, Pennsylvania
ⓘ
Railroaders Memorial Museum, Altoona, Pennsylvania ⓘ |
| preservedLocomotive |
PRR K4s
self-linksurface differs
ⓘ
surface form:
PRR 1361
PRR K4s self-linksurface differs ⓘ
surface form:
PRR 3750
|
| primaryUse | passenger service ⓘ |
| railroadClass |
K4s Pacific
ⓘ
surface form:
K4s
|
| railway |
Pennsylvania Railroad Company
ⓘ
surface form:
Pennsylvania Railroad
|
| region | Northeastern United States ⓘ |
| retirementPeriod | 1950s ⓘ |
| serviceEntry | 1914 ⓘ |
| succeededByClass |
PRR E8
ⓘ
PRR T1 ⓘ |
| survivingUnits | 2 ⓘ |
| tenderType | coal and water tender ⓘ |
| totalProduced | 425 ⓘ |
| tractiveEffort | about 44,460 lbf ⓘ |
| UICClassification | 2′C1′ h ⓘ |
| usedOnRoute |
New York–Philadelphia–Pittsburgh–Chicago
ⓘ
surface form:
New York–Chicago
New York–St. Louis route ⓘ
surface form:
New York–St. Louis
New York City–Washington, D.C. ⓘ
surface form:
Washington, D.C.–New York
|
| usedOnService | Pennsylvania Railroad mainline passenger trains ⓘ |
| valveGear | Walschaerts ⓘ |
| 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: PRR K4s Description of subject: The PRR K4s was a class of iconic 4-6-2 "Pacific" steam locomotives that served as the primary passenger power for the Pennsylvania Railroad in the first half of the 20th century.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
PRR K2
this entity surface form:
PRR K3
this entity surface form:
PRR 1361
this entity surface form:
PRR 3750
this entity surface form:
PRR 1361
this entity surface form:
PRR 3750
this entity surface form:
Pennsylvania Railroad K4s class locomotives
this entity surface form:
PRR K4s Pacific
this entity surface form:
Pennsylvania Railroad K4s class
subject surface form:
Pennsylvania Railroad K4s class
this entity surface form:
Pennsylvania Railroad K3 class
subject surface form:
Pennsylvania Railroad K4s class
this entity surface form:
PRR 3750