UP class 4000
E1417817
UNEXPLORED
UP class 4000 refers to Union Pacific’s famous “Big Boy” series of massive 4-8-8-4 articulated steam locomotives, among the largest and most powerful ever built.
All labels observed (1)
| Label | Occurrences |
|---|---|
| UP class 4000 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T20205852 — 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: UP class 4000 Context triple: [Union Pacific Big Boy class locomotives, classDesignation, UP class 4000]
-
A.
UP 200
UP 200 is a prominent mid-distance sled dog race held annually in Michigan’s Upper Peninsula, attracting mushers and teams from across North America.
-
B.
UP-43
UP-43 is the motor vehicle registration code assigned to the Gonda district in the Indian state of Uttar Pradesh.
-
C.
CP Class 4000
CP Class 4000 is a series of high-speed electric multiple unit trains operated by Comboios de Portugal, primarily used for the Alfa Pendular tilting services.
-
D.
U4
U4 is a line of the Frankfurt U-Bahn rapid transit system in Frankfurt, Germany.
-
E.
U4
U4 is one of Vienna’s main underground metro lines, running along the city’s central axis and connecting key districts and transport hubs.
- 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: UP class 4000 Target entity description: UP class 4000 refers to Union Pacific’s famous “Big Boy” series of massive 4-8-8-4 articulated steam locomotives, among the largest and most powerful ever built.
-
A.
UP 200
UP 200 is a prominent mid-distance sled dog race held annually in Michigan’s Upper Peninsula, attracting mushers and teams from across North America.
-
B.
UP-43
UP-43 is the motor vehicle registration code assigned to the Gonda district in the Indian state of Uttar Pradesh.
-
C.
CP Class 4000
CP Class 4000 is a series of high-speed electric multiple unit trains operated by Comboios de Portugal, primarily used for the Alfa Pendular tilting services.
-
D.
U4
U4 is a line of the Frankfurt U-Bahn rapid transit system in Frankfurt, Germany.
-
E.
U4
U4 is one of Vienna’s main underground metro lines, running along the city’s central axis and connecting key districts and transport hubs.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.