M4
E922288
M4 is one of the main lines of the Paris Métro, running north–south across the city and serving several central and historically significant stations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11379102 — 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: M4 Context triple: [Saint-Sulpice metro station, networkMapCode, M4]
-
A.
M4
M4 is a boat line that operates as part of Geneva’s public transport network, providing passenger service across Lake Geneva.
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B.
M4
M4 is a general-purpose macro processing language and preprocessor commonly used in Unix-like build systems and tools such as GNU Autoconf.
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C.
M4
M4 is one of the lines of the Bucharest Metro rapid transit system, serving several northern and northwestern districts of Romania’s capital.
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D.
M4
M4 is a major British motorway that runs between London and South Wales, serving as a key route for traffic to and from the west of England.
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E.
M4
M4 is a driverless metro line in the Copenhagen Metro system that serves key waterfront and urban development areas of the city.
- 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: M4 Target entity description: M4 is one of the main lines of the Paris Métro, running north–south across the city and serving several central and historically significant stations.
-
A.
M4
M4 is a boat line that operates as part of Geneva’s public transport network, providing passenger service across Lake Geneva.
-
B.
M4
M4 is a major British motorway that runs between London and South Wales, serving as a key route for traffic to and from the west of England.
-
C.
M4
M4 is a general-purpose macro processing language and preprocessor commonly used in Unix-like build systems and tools such as GNU Autoconf.
-
D.
M4
M4 is a driverless metro line in the Copenhagen Metro system that serves key waterfront and urban development areas of the city.
-
E.
M4
M4 is one of the lines of the Bucharest Metro rapid transit system, serving several northern and northwestern districts of Romania’s capital.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Paris Métro line
ⓘ
rapid transit line ⓘ |
| automation | fully automated ⓘ |
| automationConversionCompletion | 2023 ⓘ |
| character | underground ⓘ |
| colorOnMap | purple ⓘ |
| connectsWith |
Gare de l’Est railway station
NERFINISHED
ⓘ
Gare du Nord railway station NERFINISHED ⓘ RER A NERFINISHED ⓘ RER B NERFINISHED ⓘ RER D NERFINISHED ⓘ |
| country | France ⓘ |
| direction | north–south ⓘ |
| electrification | 750 V DC third rail ⓘ |
| fareZone | 1 ⓘ |
| formerNorthernTerminus | Porte d’Orléans NERFINISHED ⓘ |
| formerSouthernTerminus | Mairie de Montrouge NERFINISHED ⓘ |
| hasStation |
Châtelet
NERFINISHED
ⓘ
Cité NERFINISHED ⓘ Gare de l’Est NERFINISHED ⓘ Gare du Nord NERFINISHED ⓘ Les Halles NERFINISHED ⓘ Montparnasse–Bienvenüe NERFINISHED ⓘ Odéon NERFINISHED ⓘ Réaumur–Sébastopol NERFINISHED ⓘ Saint-Germain-des-Prés NERFINISHED ⓘ Saint-Michel NERFINISHED ⓘ Strasbourg–Saint-Denis NERFINISHED ⓘ |
| lineLength | about 14 km ⓘ |
| lineNumber | 4 ⓘ |
| locale | Paris NERFINISHED ⓘ |
| notableFeature |
first north–south cross-city line of the Paris Métro
ⓘ
one of the busiest lines of the Paris Métro ⓘ |
| numberOfStations | around 27 ⓘ |
| openingDate | 1908-04-21 ⓘ |
| operator |
RATP group
ⓘ
surface form:
RATP
|
| passesUnder | Seine NERFINISHED ⓘ |
| rollingStock |
MP 05
NERFINISHED
ⓘ
MP 14 NERFINISHED ⓘ MP 89 NERFINISHED ⓘ |
| serves | central Paris ⓘ |
| servesArea |
Left Bank
NERFINISHED
ⓘ
Right Bank ⓘ Île de la Cité NERFINISHED ⓘ |
| system | Paris Métro NERFINISHED ⓘ |
| terminusNorth | Bagneux–Lucie Aubrac NERFINISHED ⓘ |
| terminusSouth | Porte de Clignancourt NERFINISHED ⓘ |
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: M4 Description of subject: M4 is one of the main lines of the Paris Métro, running north–south across the city and serving several central and historically significant stations.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.