San Martín Line (Buenos Aires commuter rail)
E786335
The San Martín Line is a major commuter rail service in Buenos Aires that connects the city center with western suburbs, helping to form part of the metropolitan area's core public transport network.
All labels observed (1)
| Label | Occurrences |
|---|---|
| San Martín Line (Buenos Aires commuter rail) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8408834 — 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: San Martín Line (Buenos Aires commuter rail) Context triple: [Buenos Aires Underground Line E, hasInterchangeWith, San Martín Line (Buenos Aires commuter rail)]
-
A.
Mitre Line (Buenos Aires commuter rail)
The Mitre Line is a major commuter rail network in Buenos Aires that connects the city center with several northern suburbs and outlying districts.
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B.
Buenos Aires Premetro
Buenos Aires Premetro is a light rail feeder system in Buenos Aires that connects outlying neighborhoods to the city’s main subway network.
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C.
Buenos Aires commuter rail network
The Buenos Aires commuter rail network is an extensive suburban railway system that connects the Argentine capital with its surrounding metropolitan area, serving as a major backbone of daily passenger transport.
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D.
Buenos Aires Underground Line A
Buenos Aires Underground Line A is the oldest line of the Buenos Aires Metro, known for its historic wooden cars and route linking the city center with western neighborhoods.
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E.
Line H (Buenos Aires Underground)
Line H of the Buenos Aires Underground is a metro line that runs roughly north–south, connecting key neighborhoods and transit hubs across the city as part of its rapid transit 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: San Martín Line (Buenos Aires commuter rail) Target entity description: The San Martín Line is a major commuter rail service in Buenos Aires that connects the city center with western suburbs, helping to form part of the metropolitan area's core public transport network.
-
A.
Mitre Line (Buenos Aires commuter rail)
The Mitre Line is a major commuter rail network in Buenos Aires that connects the city center with several northern suburbs and outlying districts.
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B.
Buenos Aires Premetro
Buenos Aires Premetro is a light rail feeder system in Buenos Aires that connects outlying neighborhoods to the city’s main subway network.
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C.
Buenos Aires commuter rail network
The Buenos Aires commuter rail network is an extensive suburban railway system that connects the Argentine capital with its surrounding metropolitan area, serving as a major backbone of daily passenger transport.
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D.
Buenos Aires Underground Line A
Buenos Aires Underground Line A is the oldest line of the Buenos Aires Metro, known for its historic wooden cars and route linking the city center with western neighborhoods.
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E.
Line H (Buenos Aires Underground)
Line H of the Buenos Aires Underground is a metro line that runs roughly north–south, connecting key neighborhoods and transit hubs across the city as part of its rapid transit network.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
public transport service ⓘ railway line ⓘ |
| connects |
Buenos Aires city centre
NERFINISHED
ⓘ
western suburbs of Buenos Aires ⓘ |
| connectsTo |
Caseros
NERFINISHED
ⓘ
José C. Paz NERFINISHED ⓘ Palermo neighborhood NERFINISHED ⓘ Pilar NERFINISHED ⓘ San Miguel NERFINISHED ⓘ Villa del Parque neighborhood NERFINISHED ⓘ |
| country | Argentina ⓘ |
| electrification | non‑electrified ⓘ |
| fareSystem | SUBE smart card system NERFINISHED ⓘ |
| formerName | Ferrocarril General San Martín suburban services NERFINISHED ⓘ |
| formsPartOf | core public transport network of Greater Buenos Aires ⓘ |
| function |
commuter transport
ⓘ
suburban rail transport ⓘ |
| historicalOperator |
Ferrocarriles Argentinos
NERFINISHED
ⓘ
Metropolitano NERFINISHED ⓘ UGOFE NERFINISHED ⓘ |
| interchangeWith |
Belgrano Norte Line
NERFINISHED
ⓘ
Buenos Aires Underground Line C NERFINISHED ⓘ Buenos Aires Underground Line D NERFINISHED ⓘ Mitre Line (Buenos Aires commuter rail) NERFINISHED ⓘ |
| lineColor | blue (commonly used in maps) ⓘ |
| locatedIn |
Autonomous City of Buenos Aires
NERFINISHED
ⓘ
Buenos Aires Province NERFINISHED ⓘ |
| namedAfter | José de San Martín NERFINISHED ⓘ |
| numberOfTracks | double track (most of the route) ⓘ |
| openedAsSuburbanService | mid‑20th century ⓘ |
| operator | Trenes Argentinos Operaciones NERFINISHED ⓘ |
| originalRailway | Ferrocarril Buenos Aires al Pacífico NERFINISHED ⓘ |
| owner | Government of Argentina NERFINISHED ⓘ |
| partOfNetwork | Buenos Aires commuter rail network NERFINISHED ⓘ |
| primaryStation | Retiro railway station complex NERFINISHED ⓘ |
| region | Buenos Aires Metropolitan Area NERFINISHED ⓘ |
| safetySystem | automatic signalling (on most sections) ⓘ |
| servesCity | Buenos Aires NERFINISHED ⓘ |
| serviceType | commuter rail ⓘ |
| status | operational ⓘ |
| terminus |
Dr. Domingo Cabred station
NERFINISHED
ⓘ
Pilar station NERFINISHED ⓘ Retiro San Martín station NERFINISHED ⓘ |
| trackGauge | broad gauge ⓘ |
| tractionType | diesel ⓘ |
| upgradeProjects |
planned electrification
ⓘ
viaduct construction in Palermo–La Paternal section ⓘ |
| usesRollingStock |
CSR diesel multiple units
NERFINISHED
ⓘ
locomotive‑hauled passenger coaches ⓘ |
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: San Martín Line (Buenos Aires commuter rail) Description of subject: The San Martín Line is a major commuter rail service in Buenos Aires that connects the city center with western suburbs, helping to form part of the metropolitan area's core public transport network.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
Buenos Aires Underground Line E
→
hasInterchangeWith
→
San Martín Line (Buenos Aires commuter rail)
ⓘ