M1
E629456
M1 is one of the main lines of the Bucharest Metro, forming part of the city’s core rapid transit network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M1 canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T6938196 — 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: M1 Context triple: [Bucharest Metro, hasLine, M1]
-
A.
M1
M1 is a boat line that operates as part of Geneva’s public transport network, providing passenger service across the city’s waters.
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B.
M1
M1 is the first and primary north–south metro line of the Warsaw Metro system in Poland.
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C.
M1
M1 is one of the main lines of the Copenhagen Metro, providing rapid transit service through central Copenhagen and connecting key residential and commercial areas.
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D.
M1
M1 is Budapest’s historic Millennium Underground line, one of the world’s oldest metro lines and a UNESCO World Heritage site.
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E.
M1
M1 is a major motorway in New South Wales, Australia, forming a key part of the coastal route between Sydney and the state's northern and southern regions.
- 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: M1 Target entity description: M1 is one of the main lines of the Bucharest Metro, forming part of the city’s core rapid transit network.
-
A.
M1
M1 is one of the main lines of the Copenhagen Metro, providing rapid transit service through central Copenhagen and connecting key residential and commercial areas.
-
B.
M1
M1 is the first and primary north–south metro line of the Warsaw Metro system in Poland.
-
C.
M1
M1 is Budapest’s historic Millennium Underground line, one of the world’s oldest metro lines and a UNESCO World Heritage site.
-
D.
M1
M1 is a light metro line in Lausanne, Switzerland, connecting the city center with the university and lakeside areas.
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E.
M1
M1 is a major north–south motorway in England connecting London with Leeds and forming a key part of the UK’s primary road network.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf | metro line ⓘ |
| cityServed | Bucharest ⓘ |
| country | Romania ⓘ |
| electrification |
750 V DC
ⓘ
third rail ⓘ |
| fareCollection | ticket and contactless card ⓘ |
| fareSystem | integrated with Bucharest Metro ⓘ |
| hasLanguageOfSignage |
English
ⓘ
Romanian ⓘ |
| hasMode | underground ⓘ |
| hasRollingStockType | electric multiple unit ⓘ |
| isInUse | true ⓘ |
| isUrbanRail | true ⓘ |
| locatedIn |
Bucharest
ⓘ
Romania ⓘ |
| networkRole | core line ⓘ |
| operator | Metrorex ⓘ |
| ownedBy | Metrorex ⓘ |
| partOf | Bucharest Metro ⓘ |
| partOfCategory | Bucharest Metro lines ⓘ |
| publicTransportType | metro ⓘ |
| safetySystem | automatic train protection ⓘ |
| system | Bucharest Metro ⓘ |
| trackGauge | standard gauge ⓘ |
| transportType | rapid transit ⓘ |
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: M1 Description of subject: M1 is one of the main lines of the Bucharest Metro, forming part of the city’s core rapid transit network.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.