PRR K2
E371411
The PRR K2 was an early class of steam locomotives used by the Pennsylvania Railroad, serving as a predecessor to the more famous K4s Pacific-type engines.
All labels observed (4)
| Label | Occurrences |
|---|---|
| PRR K-class Pacifics | 1 |
| PRR K2 canonical | 1 |
| PRR K3 | 1 |
| Pennsylvania Railroad K2 class | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3604235 — 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 K2 Context triple: [PRR K4s, precededByClass, PRR K2]
-
A.
PRR K4s
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.
-
B.
PRR T1
The PRR T1 was a class of streamlined 4-4-4-4 duplex steam locomotives built for the Pennsylvania Railroad in the 1940s, known for their high-speed passenger service and distinctive Art Deco styling.
-
C.
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.
-
D.
CP Class 2240 EMU
The CP Class 2240 EMU is a series of electric multiple unit trains operated by Comboios de Portugal, primarily used for suburban and regional passenger services.
-
E.
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.
- 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 K2 Target entity description: The PRR K2 was an early class of steam locomotives used by the Pennsylvania Railroad, serving as a predecessor to the more famous K4s Pacific-type engines.
-
A.
PRR K4s
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.
-
B.
PRR T1
The PRR T1 was a class of streamlined 4-4-4-4 duplex steam locomotives built for the Pennsylvania Railroad in the 1940s, known for their high-speed passenger service and distinctive Art Deco styling.
-
C.
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.
-
D.
CP Class 2240 EMU
The CP Class 2240 EMU is a series of electric multiple unit trains operated by Comboios de Portugal, primarily used for suburban and regional passenger services.
-
E.
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.
- F. None of above. chosen
Statements (33)
| Predicate | Object |
|---|---|
| instanceOf |
Pennsylvania Railroad locomotive class
ⓘ
steam locomotive class ⓘ |
| builder | Pennsylvania Railroad Altoona Works ⓘ |
| category |
4-6-2 steam locomotives
ⓘ
Pennsylvania Railroad locomotives ⓘ steam locomotives of the United States ⓘ |
| configuration | 4-6-2 ⓘ |
| countryOfOperation |
United States of America
ⓘ
surface form:
United States
|
| designedBy |
Pennsylvania Railroad Altoona Works
ⓘ
surface form:
Pennsylvania Railroad mechanical department
|
| designedFor | high‑speed passenger service ⓘ |
| era | early 20th century ⓘ |
| fuelType | coal ⓘ |
| gauge | standard gauge ⓘ |
| historicalSignificance | early PRR Pacific development ⓘ |
| locomotiveFamily |
PRR K2
self-linksurface differs
ⓘ
surface form:
PRR K-class Pacifics
|
| locomotiveType | tender locomotive ⓘ |
| nicknamed | Pacific type ⓘ |
| notableAs | predecessor to PRR K4s Pacifics ⓘ |
| operator |
Pennsylvania Railroad Company
ⓘ
surface form:
Pennsylvania Railroad
|
| powerType | steam ⓘ |
| predecessorOf | PRR K4s ⓘ |
| primaryStateOfOperation | Pennsylvania ⓘ |
| railroad |
Main Line (Philadelphia to Pittsburgh)
ⓘ
surface form:
Pennsylvania Railroad main line
|
| railroadRegion | Northeastern United States ⓘ |
| railwayCompany |
Pennsylvania Railroad Company
ⓘ
surface form:
Pennsylvania Railroad
|
| railwaySystem |
Pennsylvania Railroad Company
ⓘ
surface form:
Pennsylvania Railroad system
|
| serviceType | steam era passenger locomotive ⓘ |
| successorClass |
PRR K4s
ⓘ
surface form:
PRR K4s Pacific
|
| traction | adhesion ⓘ |
| UICClassification | 2′C1′ ⓘ |
| usedFor |
mainline passenger trains
ⓘ
passenger service ⓘ |
| WhyteNotation | 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 K2 Description of subject: The PRR K2 was an early class of steam locomotives used by the Pennsylvania Railroad, serving as a predecessor to the more famous K4s Pacific-type engines.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
PRR K3
this entity surface form:
PRR K-class Pacifics
subject surface form:
Pennsylvania Railroad K4s class
this entity surface form:
Pennsylvania Railroad K2 class