R21
E871748
R21 is a regional commuter rail line in Catalonia, Spain, operated as part of the Rodalies de Catalunya network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| R21 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10574953 — 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: R21 Context triple: [Rodalies de Catalunya, hasService, R21]
-
A.
R211
The R211 is a modern class of New York City Subway cars designed to replace older rolling stock and improve reliability, capacity, and passenger amenities on lines including the BMT Canarsie Line.
-
B.
R2
R2 is the MBTA station code used to identify Ashmont station on Boston's Red Line transit system.
-
C.
R-14
R-14 was a Soviet intermediate-range ballistic missile developed during the Cold War and known in the West by its NATO reporting name SS-5 Skean.
-
D.
R11
R11 is the internal station code used by the New York City Subway for the Grand Central–42nd Street complex in Midtown Manhattan.
-
E.
R2N
R2N is the symbol used to designate the R2 Nord commuter rail line in the Barcelona suburban railway network.
- 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: R21 Target entity description: R21 is a regional commuter rail line in Catalonia, Spain, operated as part of the Rodalies de Catalunya network.
-
A.
R211
The R211 is a modern class of New York City Subway cars designed to replace older rolling stock and improve reliability, capacity, and passenger amenities on lines including the BMT Canarsie Line.
-
B.
R2
R2 is the MBTA station code used to identify Ashmont station on Boston's Red Line transit system.
-
C.
R-14
R-14 was a Soviet intermediate-range ballistic missile developed during the Cold War and known in the West by its NATO reporting name SS-5 Skean.
-
D.
R11
R11 is the internal station code used by the New York City Subway for the Grand Central–42nd Street complex in Midtown Manhattan.
-
E.
R2N
R2N is the symbol used to designate the R2 Nord commuter rail line in the Barcelona suburban railway network.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
regional rail service ⓘ |
| continent | Europe ⓘ |
| country | Spain ⓘ |
| countryServed | Spain ⓘ |
| electrification | overhead line ⓘ |
| fareSystem | integrated public transport fares in Catalonia ⓘ |
| freightService | no ⓘ |
| hasRollingStockType | electric multiple unit ⓘ |
| locatedIn | Catalonia ⓘ |
| locatedInAdministrativeTerritory |
Autonomous Community of Catalonia
ⓘ
linked to:
Autonomous community of Catalonia
|
| networkType | suburban rail network ⓘ |
| operatedBy | Rodalies de Catalunya ⓘ |
| operatorType | public transport operator ⓘ |
| partOf | Rodalies de Catalunya ⓘ |
| passengerService | yes ⓘ |
| primaryUse | commuter transport ⓘ |
| railGauge | Iberian gauge ⓘ |
| railNetwork | Rodalies de Catalunya ⓘ |
| railwaySystem | Spanish railway system ⓘ |
| regionServed | Catalonia ⓘ |
| serviceType |
commuter rail
ⓘ
regional rail ⓘ |
| ticketingSystem | Rodalies de Catalunya ticketing ⓘ |
| transportMode | rail ⓘ |
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: R21 Description of subject: R21 is a regional commuter rail line in Catalonia, Spain, operated as part of the Rodalies de Catalunya network.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.