British Rail Class 121 DMU
E1444976
UNEXPLORED
The British Rail Class 121 DMU is a type of single-car diesel multiple unit introduced in the late 1950s for suburban and branch line services on the British railway network.
All labels observed (2)
| Label | Occurrences |
|---|---|
| British Rail Class 121 DMU canonical | 1 |
| British Rail Class 122 DMU | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T20316183 — 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: British Rail Class 121 DMU Context triple: [BR Derby Works, designed, British Rail Class 121 DMU]
-
A.
British Rail Class 120 DMU
The British Rail Class 120 DMU was a class of cross-country diesel multiple units introduced in the late 1950s for long-distance services on British Rail’s Western and Scottish Regions.
-
B.
British Rail Class 117 DMU
The British Rail Class 117 DMU is a type of first-generation diesel multiple unit built for suburban and regional passenger services on British Rail from the late 1950s.
-
C.
British Rail Class 116 DMU
The British Rail Class 116 DMU is a type of first-generation diesel multiple unit built for suburban and commuter services on the British railway network in the late 1950s and 1960s.
-
D.
British Rail Class 118 DMU
The British Rail Class 118 DMU was a type of first-generation diesel multiple unit built for suburban and regional passenger services on British Rail in the mid-20th century.
-
E.
British Rail Class 119 DMU
The British Rail Class 119 DMU was a type of diesel multiple unit built in the late 1950s for suburban and cross-country passenger services on the Western Region of British Railways.
- 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: British Rail Class 121 DMU Target entity description: The British Rail Class 121 DMU is a type of single-car diesel multiple unit introduced in the late 1950s for suburban and branch line services on the British railway network.
-
A.
British Rail Class 120 DMU
The British Rail Class 120 DMU was a class of cross-country diesel multiple units introduced in the late 1950s for long-distance services on British Rail’s Western and Scottish Regions.
-
B.
British Rail Class 117 DMU
The British Rail Class 117 DMU is a type of first-generation diesel multiple unit built for suburban and regional passenger services on British Rail from the late 1950s.
-
C.
British Rail Class 116 DMU
The British Rail Class 116 DMU is a type of first-generation diesel multiple unit built for suburban and commuter services on the British railway network in the late 1950s and 1960s.
-
D.
British Rail Class 118 DMU
The British Rail Class 118 DMU was a type of first-generation diesel multiple unit built for suburban and regional passenger services on British Rail in the mid-20th century.
-
E.
British Rail Class 119 DMU
The British Rail Class 119 DMU was a type of diesel multiple unit built in the late 1950s for suburban and cross-country passenger services on the Western Region of British Railways.
- F. None of above. chosen
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: British Rail Class 121 DMU