C-9
E142032
C-9 is a mountain railway line of Madrid’s Cercanías commuter rail network that connects the city with the Sierra de Guadarrama, including the Puerto de Navacerrada and Cotos areas.
All labels observed (1)
| Label | Occurrences |
|---|---|
| C-9 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1236010 — 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: C-9 Context triple: [Cercanías Madrid, line, C-9]
-
A.
C-7
C-7 is a commuter rail line in the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
B.
C-8
C-8 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
C.
C-1
C-1 is a commuter rail line in the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
-
D.
C.205
C.205 is the Italian Air Force designation for the Macchi C.205 Veltro, a World War II-era single-seat fighter aircraft.
-
E.
Clerget 9B
The Clerget 9B is a World War I-era French nine-cylinder rotary aircraft engine widely used in British fighter planes.
- 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: C-9 Target entity description: C-9 is a mountain railway line of Madrid’s Cercanías commuter rail network that connects the city with the Sierra de Guadarrama, including the Puerto de Navacerrada and Cotos areas.
-
A.
C-7
C-7 is a commuter rail line in the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
B.
C-8
C-8 is a commuter rail line within the Cercanías Madrid network that connects central Madrid with various suburban areas.
-
C.
C-1
C-1 is a commuter rail line in the Cercanías Madrid network that connects central Madrid with its surrounding metropolitan areas.
-
D.
C.205
C.205 is the Italian Air Force designation for the Macchi C.205 Veltro, a World War II-era single-seat fighter aircraft.
-
E.
Clerget 9B
The Clerget 9B is a World War I-era French nine-cylinder rotary aircraft engine widely used in British fighter planes.
- F. None of above. chosen
Statements (26)
| Predicate | Object |
|---|---|
| instanceOf |
Cercanías Madrid line
ⓘ
commuter rail line ⓘ mountain railway line ⓘ |
| category |
Mountain railways in Spain
ⓘ
Rail transport in the Community of Madrid ⓘ |
| connects |
Madrid
ⓘ
Sierra de Guadarrama ⓘ |
| country | Spain ⓘ |
| electrification | overhead line ⓘ |
| gauge | Iberian gauge ⓘ |
| hasRouteSegment |
Puerto de Navacerrada
ⓘ
surface form:
Cercedilla–Puerto de Navacerrada
Puerto de Navacerrada ⓘ
surface form:
Puerto de Navacerrada–Cotos
|
| locatedIn | Community of Madrid ⓘ |
| namedAfter | line number 9 of Cercanías Madrid ⓘ |
| network |
Cercanías Madrid commuter rail
ⓘ
surface form:
Cercanías Madrid
|
| operator | Renfe Operadora ⓘ |
| owner | Administrador de Infraestructuras Ferroviarias ⓘ |
| partOf |
Cercanías Madrid commuter rail
ⓘ
surface form:
Cercanías Madrid
|
| primaryUse | passenger transport ⓘ |
| serves |
Cotos
ⓘ
Puerto de Navacerrada ⓘ Sierra de Guadarrama ⓘ |
| serviceType |
commuter rail
ⓘ
regional rail ⓘ |
| terrain | mountainous ⓘ |
| transportType | railway ⓘ |
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: C-9 Description of subject: C-9 is a mountain railway line of Madrid’s Cercanías commuter rail network that connects the city with the Sierra de Guadarrama, including the Puerto de Navacerrada and Cotos areas.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Cercanías Madrid