Class 4000 DMU
E1028231
The Class 4000 DMU is a modern diesel multiple unit train operated by Northern Ireland Railways for passenger services, particularly on routes around Belfast.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Class 4000 DMU canonical | 5 |
| NIR Class 4000 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T13204346 — 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: Class 4000 DMU Context triple: [Belfast suburban rail system, usesRollingStock, Class 4000 DMU]
-
A.
Class 3000 DMU
The Class 3000 DMU is a fleet of modern diesel multiple-unit passenger trains operated by Northern Ireland Railways, primarily used on regional and suburban services.
-
B.
Class 170 diesel multiple unit
The Class 170 diesel multiple unit is a British Turbostar family regional train used extensively for passenger services across the UK rail network.
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C.
Class 196 diesel multiple unit
The Class 196 diesel multiple unit is a modern British regional train operated by West Midlands Railway, designed for medium-distance services with improved performance, accessibility, and passenger comfort.
-
D.
Class 150 diesel multiple unit
The Class 150 diesel multiple unit is a British two- or three-car regional passenger train introduced in the 1980s and widely used on local and suburban services across the UK rail network.
-
E.
Class 156 diesel multiple unit
The Class 156 diesel multiple unit is a British two-car regional train type introduced in the late 1980s for local and medium-distance passenger services.
- 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: Class 4000 DMU Target entity description: The Class 4000 DMU is a modern diesel multiple unit train operated by Northern Ireland Railways for passenger services, particularly on routes around Belfast.
-
A.
Class 3000 DMU
The Class 3000 DMU is a fleet of modern diesel multiple-unit passenger trains operated by Northern Ireland Railways, primarily used on regional and suburban services.
-
B.
Class 170 diesel multiple unit
The Class 170 diesel multiple unit is a British Turbostar family regional train used extensively for passenger services across the UK rail network.
-
C.
Class 196 diesel multiple unit
The Class 196 diesel multiple unit is a modern British regional train operated by West Midlands Railway, designed for medium-distance services with improved performance, accessibility, and passenger comfort.
-
D.
Class 150 diesel multiple unit
The Class 150 diesel multiple unit is a British two- or three-car regional passenger train introduced in the 1980s and widely used on local and suburban services across the UK rail network.
-
E.
Class 156 diesel multiple unit
The Class 156 diesel multiple unit is a British two-car regional train type introduced in the late 1980s for local and medium-distance passenger services.
- F. None of above. chosen
Statements (38)
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: Class 4000 DMU Description of subject: The Class 4000 DMU is a modern diesel multiple unit train operated by Northern Ireland Railways for passenger services, particularly on routes around Belfast.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Class 4000 DMU