Line 4 (Madrid Metro)
E146316
Line 4 of the Madrid Metro is a rapid transit line serving several northern and eastern districts of Madrid, connecting key residential and commercial areas to the city’s broader subway network.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Line 4 (Madrid Metro) canonical | 21 |
| Madrid Metro Line 4 | 6 |
| Line 4 of the Madrid Metro | 3 |
| Madrid Metro Line 4 stations | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1226489 — 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: Line 4 (Madrid Metro) Context triple: [Madrid Metro, hasLine, Line 4 (Madrid Metro)]
-
A.
Line 3 (Madrid Metro)
Line 3 of the Madrid Metro is a major north–south underground line in Madrid, Spain, connecting key central and residential areas and serving as one of the network’s primary transit corridors.
-
B.
Line 2 (Madrid Metro)
Line 2 of the Madrid Metro is one of the system’s main urban rapid transit lines, running in an east–west direction through central Madrid and connecting key neighborhoods and transfer stations.
-
C.
Metro Ligero de Madrid
Metro Ligero de Madrid is a light rail system serving several suburban and peripheral areas of Madrid, complementing the city's main metro network.
-
D.
Madrid Metro
Madrid Metro is the extensive rapid transit system serving Spain’s capital, known for its large network, frequent service, and role as a primary mode of urban transportation.
-
E.
Seville Metro
Seville Metro is a rapid transit system serving the city of Seville and its metropolitan area in southern Spain.
- 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: Line 4 (Madrid Metro) Target entity description: Line 4 of the Madrid Metro is a rapid transit line serving several northern and eastern districts of Madrid, connecting key residential and commercial areas to the city’s broader subway network.
-
A.
Line 3 (Madrid Metro)
Line 3 of the Madrid Metro is a major north–south underground line in Madrid, Spain, connecting key central and residential areas and serving as one of the network’s primary transit corridors.
-
B.
Line 2 (Madrid Metro)
Line 2 of the Madrid Metro is one of the system’s main urban rapid transit lines, running in an east–west direction through central Madrid and connecting key neighborhoods and transfer stations.
-
C.
Metro Ligero de Madrid
Metro Ligero de Madrid is a light rail system serving several suburban and peripheral areas of Madrid, complementing the city's main metro network.
-
D.
Madrid Metro
Madrid Metro is the extensive rapid transit system serving Spain’s capital, known for its large network, frequent service, and role as a primary mode of urban transportation.
-
E.
Seville Metro
Seville Metro is a rapid transit system serving the city of Seville and its metropolitan area in southern Spain.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
rapid transit line ⓘ |
| character | underground ⓘ |
| city | Madrid ⓘ |
| connectsCommercialAreas | Madrid commercial districts ⓘ |
| connectsResidentialAreas |
eastern Madrid
ⓘ
northern Madrid ⓘ |
| connectsTo |
Cercanías Madrid
ⓘ
linked to:
Cercanías Madrid commuter rail
Line 1 (Madrid Metro) ⓘ
linked to:
Madrid Metro Line 1
Line 2 (Madrid Metro) ⓘ Line 3 (Madrid Metro) ⓘ Line 5 (Madrid Metro) ⓘ Line 6 (Madrid Metro) ⓘ Line 7 (Madrid Metro) ⓘ Line 8 (Madrid Metro) ⓘ Line 9 (Madrid Metro) ⓘ Madrid Metro network ⓘ
linked to:
Madrid Metro
Madrid city bus network ⓘ
linked to:
Madrid city buses
|
| country | Spain ⓘ |
| electrification | electric rail system ⓘ |
| fareCollection | ticket and contactless card system ⓘ |
| fareSystem | Madrid public transport integrated fare system ⓘ |
| hasAccessibilityFeatures | yes ⓘ |
| hasLanguageOfSignage |
English
ⓘ
Spanish ⓘ |
| hasMode | rail ⓘ |
| isPartOfNetwork |
Madrid urban rail network
ⓘ
linked to:
Madrid Metro
|
| isPublicTransport | yes ⓘ |
| isUrbanRail | yes ⓘ |
| locatedIn |
Community of Madrid
ⓘ
Madrid ⓘ Spain ⓘ |
| networkRole | core line of Madrid Metro ⓘ |
| operator |
Metro de Madrid
ⓘ
linked to:
Madrid Metro
|
| owner | Consorcio Regional de Transportes de Madrid ⓘ |
| partOf | Madrid Metro ⓘ |
| rollingStockType | electric multiple units ⓘ |
| safetySystem | automatic train protection ⓘ |
| servesArea |
eastern districts of Madrid
ⓘ
northern districts of Madrid ⓘ |
| servesFunction |
connect commercial areas to city centre
ⓘ
connect residential areas to city centre ⓘ provide east–west connectivity in Madrid ⓘ provide north–south connectivity in Madrid ⓘ |
| system | Madrid Metro ⓘ |
| transitType | 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: Line 4 (Madrid Metro) Description of subject: Line 4 of the Madrid Metro is a rapid transit line serving several northern and eastern districts of Madrid, connecting key residential and commercial areas to the city’s broader subway network.
Referenced by (31)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Line 4 (Madrid Metro)
subject linked to:
Salamanca district of Madrid
linked to: Line 4 (Madrid Metro)
linked to: Line 4 (Madrid Metro)
subject linked to:
Chamberí district
linked to: Line 4 (Madrid Metro)
subject linked to:
Ciudad Lineal district of Madrid
linked to: Line 4 (Madrid Metro)
subject linked to:
Chamberí District of Madrid
linked to: Line 4 (Madrid Metro)
linked to: Line 4 (Madrid Metro)
linked to: Line 4 (Madrid Metro)
linked to: Line 4 (Madrid Metro)
subject linked to:
Bilbao