PS-2 covered hopper
E523142
The PS-2 covered hopper is a widely used mid-20th-century American railroad freight car type known for its enclosed design and multiple bays for transporting bulk granular commodities like grain, cement, and chemicals.
All labels observed (1)
| Label | Occurrences |
|---|---|
| PS-2 covered hopper canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5481915 — 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: PS-2 covered hopper Context triple: [Pullman-Standard, designed, PS-2 covered hopper]
-
A.
Unifeeder
Unifeeder is a European logistics and shortsea shipping company that operates container feeder and regional transport services connecting major ports and smaller terminals.
-
B.
Hopper
Hopper is the ruthless grasshopper leader and main villain in Pixar's animated film "A Bug's Life," known for terrorizing an ant colony to maintain his power.
-
C.
Hopper
Hopper is a surname most famously associated with Edward Hopper, the American realist painter known for his evocative depictions of modern urban life and isolation.
-
D.
PCS 7027
PCS 7027 is the original UK stereo catalog number assigned to The Beatles’ landmark 1967 album "Sgt. Pepper's Lonely Hearts Club Band."
-
E.
Scharfenberg coupler
The Scharfenberg coupler is an automatic railway coupling system widely used on modern passenger trains to quickly connect and disconnect cars while integrating mechanical, pneumatic, and electrical links.
- 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: PS-2 covered hopper Target entity description: The PS-2 covered hopper is a widely used mid-20th-century American railroad freight car type known for its enclosed design and multiple bays for transporting bulk granular commodities like grain, cement, and chemicals.
-
A.
Unifeeder
Unifeeder is a European logistics and shortsea shipping company that operates container feeder and regional transport services connecting major ports and smaller terminals.
-
B.
Hopper
Hopper is the ruthless grasshopper leader and main villain in Pixar's animated film "A Bug's Life," known for terrorizing an ant colony to maintain his power.
-
C.
Hopper
Hopper is a surname most famously associated with Edward Hopper, the American realist painter known for his evocative depictions of modern urban life and isolation.
-
D.
PCS 7027
PCS 7027 is the original UK stereo catalog number assigned to The Beatles’ landmark 1967 album "Sgt. Pepper's Lonely Hearts Club Band."
-
E.
Scharfenberg coupler
The Scharfenberg coupler is an automatic railway coupling system widely used on modern passenger trains to quickly connect and disconnect cars while integrating mechanical, pneumatic, and electrical links.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
covered hopper freight car
ⓘ
railroad freight car type ⓘ railway rolling stock design ⓘ |
| builder | Pullman-Standard Car Manufacturing Company NERFINISHED ⓘ |
| category |
North American freight rolling stock
ⓘ
covered hoppers built by Pullman-Standard ⓘ grain cars ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designedFor |
efficient loading and unloading of bulk commodities
ⓘ
protection of lading from weather ⓘ |
| designedToCarry | dry bulk commodities ⓘ |
| designFeature |
enclosed carbody
ⓘ
gravity-discharge hoppers ⓘ multiple hopper bays ⓘ roof loading hatches ⓘ |
| era | mid-20th century ⓘ |
| hasBays | multiple bays ⓘ |
| hasEnclosedDesign | true ⓘ |
| hasRoofType | steel roof with loading hatches ⓘ |
| hasVariant |
PS-2 2-bay covered hopper
ⓘ
PS-2 3-bay covered hopper ⓘ |
| influenced | later covered hopper designs ⓘ |
| introducedInDecade | 1950s ⓘ |
| manufacturer | Pullman-Standard NERFINISHED ⓘ |
| material | steel ⓘ |
| notableFor |
standardization of covered hopper design
ⓘ
wide use in mid-20th-century American freight service ⓘ |
| operatedOn | freight trains ⓘ |
| protectsCargoFrom |
contamination
ⓘ
rain ⓘ |
| railGauge | standard gauge ⓘ |
| railroadCarType | covered hopper ⓘ |
| regionOfOperation | North America NERFINISHED ⓘ |
| typicalCargo |
cement
ⓘ
chemicals ⓘ fertilizer ⓘ grain ⓘ sand ⓘ |
| unloadingMethod | bottom gravity discharge ⓘ |
| use |
transporting bulk granular commodities
ⓘ
transporting cement ⓘ transporting chemicals ⓘ transporting grain ⓘ |
| usedBy | multiple North American railroads ⓘ |
| usedDuringPeriod |
postwar era
ⓘ
transition era from steam to diesel locomotives ⓘ |
| usedInCountry |
United States of America
ⓘ
surface form:
United States
|
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: PS-2 covered hopper Description of subject: The PS-2 covered hopper is a widely used mid-20th-century American railroad freight car type known for its enclosed design and multiple bays for transporting bulk granular commodities like grain, cement, and chemicals.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.