Serco Caledonian Sleepers Limited
E150490
Serco Caledonian Sleepers Limited is a UK-based rail company that operates overnight sleeper train services between London and Scotland under the Caledonian Sleeper brand.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Serco Caledonian Sleepers Limited canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1319205 — 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: Serco Caledonian Sleepers Limited Context triple: [Caledonian Sleeper, operator, Serco Caledonian Sleepers Limited]
-
A.
British Rail Engineering Limited
British Rail Engineering Limited was the former engineering subsidiary of British Rail, responsible for designing, building, and maintaining much of the UK’s rolling stock and railway equipment.
-
B.
Virgin Trains
Virgin Trains was a British train operating company under Richard Branson’s Virgin Group brand that ran long-distance passenger rail services in the UK.
-
C.
Rail Delivery Group
Rail Delivery Group is the industry body that represents and coordinates Britain’s passenger and freight train operators and Network Rail, working to improve and manage the national rail system.
-
D.
British Rail
British Rail was the state-owned company that operated most of the railway services in Great Britain from the late 1940s until the privatization of the rail network in the 1990s.
-
E.
Southern Railway (UK)
Southern Railway (UK) was a major British railway company formed in 1923 that operated routes in southern England, including busy commuter and coastal lines, until nationalisation in 1948.
- 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: Serco Caledonian Sleepers Limited Target entity description: Serco Caledonian Sleepers Limited is a UK-based rail company that operates overnight sleeper train services between London and Scotland under the Caledonian Sleeper brand.
-
A.
British Rail Engineering Limited
British Rail Engineering Limited was the former engineering subsidiary of British Rail, responsible for designing, building, and maintaining much of the UK’s rolling stock and railway equipment.
-
B.
Virgin Trains
Virgin Trains was a British train operating company under Richard Branson’s Virgin Group brand that ran long-distance passenger rail services in the UK.
-
C.
Rail Delivery Group
Rail Delivery Group is the industry body that represents and coordinates Britain’s passenger and freight train operators and Network Rail, working to improve and manage the national rail system.
-
D.
British Rail
British Rail was the state-owned company that operated most of the railway services in Great Britain from the late 1940s until the privatization of the rail network in the 1990s.
-
E.
Southern Railway (UK)
Southern Railway (UK) was a major British railway company formed in 1923 that operated routes in southern England, including busy commuter and coastal lines, until nationalisation in 1948.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
railway company
ⓘ
train operating company ⓘ |
| brand | Caledonian Sleeper ⓘ |
| country | United Kingdom ⓘ |
| industry | rail transport ⓘ |
| operates | Caledonian Sleeper ⓘ |
| operatesBetween |
London
ⓘ
linked to:
London, England
Scotland ⓘ |
| parentCompany | Serco Group ⓘ |
| railMode | passenger rail transport ⓘ |
| routeEndpoint |
Aberdeen
ⓘ
Edinburgh ⓘ Fort William ⓘ Glasgow ⓘ Inverness ⓘ London Euston ⓘ |
| serviceArea |
England
ⓘ
Great Britain ⓘ Scotland ⓘ |
| serviceClass |
seated accommodation
ⓘ
sleeper cabins ⓘ |
| serviceFeature |
long-distance rail travel
ⓘ
overnight accommodation ⓘ |
| serviceType | overnight sleeper train services ⓘ |
| usesBrand | Caledonian Sleeper ⓘ |
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: Serco Caledonian Sleepers Limited Description of subject: Serco Caledonian Sleepers Limited is a UK-based rail company that operates overnight sleeper train services between London and Scotland under the Caledonian Sleeper brand.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.