San Martín Line
E191072
The San Martín Line is a commuter rail service in the Buenos Aires metropolitan area that links the city center with western suburbs.
All labels observed (1)
| Label | Occurrences |
|---|---|
| San Martín Line canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T1699329 — 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 Context triple: [Buenos Aires Underground, connectsWith, San Martín Line]
-
A.
Franklin Line
The Franklin Line is a Massachusetts Bay Transportation Authority (MBTA) commuter rail line serving communities southwest of Boston.
-
B.
Riviera Line
The Riviera Line is a scenic railway route in Devon, England, running along the coast and serving popular seaside towns between Exeter and Paignton.
-
C.
Ashton Line
The Ashton Line is a light-rail route on Greater Manchester’s Metrolink network that runs between Manchester city centre and Ashton-under-Lyne.
-
D.
E Line
The E Line is a light rail route in the Los Angeles Metro Rail system that connects downtown Los Angeles with communities to the west, including Santa Monica.
-
E.
Bernhardt Line
The Bernhardt Line was a major German defensive fortification system in southern Italy during World War II, forming part of the Winter Line that sought to slow the Allied advance up the Italian peninsula.
- 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 Target entity description: The San Martín Line is a commuter rail service in the Buenos Aires metropolitan area that links the city center with western suburbs.
-
A.
Franklin Line
The Franklin Line is a Massachusetts Bay Transportation Authority (MBTA) commuter rail line serving communities southwest of Boston.
-
B.
Riviera Line
The Riviera Line is a scenic railway route in Devon, England, running along the coast and serving popular seaside towns between Exeter and Paignton.
-
C.
Ashton Line
The Ashton Line is a light-rail route on Greater Manchester’s Metrolink network that runs between Manchester city centre and Ashton-under-Lyne.
-
D.
E Line
The E Line is a light rail route in the Los Angeles Metro Rail system that connects downtown Los Angeles with communities to the west, including Santa Monica.
-
E.
Bernhardt Line
The Bernhardt Line was a major German defensive fortification system in southern Italy during World War II, forming part of the Winter Line that sought to slow the Allied advance up the Italian peninsula.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
public transport service ⓘ railway line ⓘ |
| category |
Commuter rail lines in Argentina
ⓘ
Rail transport in Buenos Aires ⓘ |
| connectsWith |
Belgrano Norte Line at Retiro area
ⓘ
linked to:
Buenos Aires commuter rail network
Buenos Aires Underground Line B via transfer at Villa del Parque area ⓘ Buenos Aires Underground Line D at Palermo ⓘ Mitre Line at Retiro ⓘ |
| country | Argentina ⓘ |
| electrification | non‑electrified ⓘ |
| fareSystem | SUBE card compatible ⓘ |
| formerOperator |
Corredores Ferroviarios
ⓘ
Ferrocarriles Argentinos ⓘ Metropolitano ⓘ UGOFE ⓘ |
| gauge | broad gauge ⓘ |
| hasStation |
Caseros
ⓘ
linked to:
Tres de Febrero
José C. Paz ⓘ Palermo ⓘ Pilar ⓘ Retiro San Martín ⓘ
linked to:
Retiro
Villa del Parque ⓘ |
| historicalPredecessor | Buenos Aires and Pacific Railway ⓘ |
| infrastructureProject | viaduct construction through Palermo–La Paternal section ⓘ |
| locatedIn |
Buenos Aires metropolitan area
ⓘ
linked to:
Greater Buenos Aires
|
| namedAfter | José de San Martín ⓘ |
| network | Buenos Aires commuter rail network ⓘ |
| operator |
Trenes Argentinos Operaciones
ⓘ
linked to:
Trenes Argentinos
|
| owner |
Argentine State
ⓘ
linked to:
Argentine state
|
| primaryTraction | diesel ⓘ |
| regionServed |
Autonomous City of Buenos Aires
ⓘ
Buenos Aires Province ⓘ |
| rollingStock |
diesel multiple units
ⓘ
locomotive‑hauled passenger coaches ⓘ |
| safetySystem | automatic block signaling on most sections ⓘ |
| serves |
Buenos Aires city center
ⓘ
linked to:
Buenos Aires
western suburbs of Buenos Aires ⓘ |
| servicePattern |
all‑stops commuter services
ⓘ
limited‑stop services at peak hours ⓘ |
| serviceType | passenger only ⓘ |
| terminus |
Pilar
ⓘ
Retiro San Martín station ⓘ |
| trackConfiguration | double track on most of its length ⓘ |
| upgradeProject | electrification project under planning and partial works ⓘ |
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 Description of subject: The San Martín Line is a commuter rail service in the Buenos Aires metropolitan area that links the city center with western suburbs.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.