Line 4–Yellow
E286895
Line 4–Yellow is a major driverless metro line in São Paulo’s rapid transit system, connecting key central and western districts with high-capacity, automated service.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Line 4–Yellow canonical | 2 |
| Line 4-Yellow | 1 |
| Line 4-Yellow of São Paulo Metro | 1 |
| Line 4–Yellow trains | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2633926 — 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–Yellow Context triple: [São Paulo Metro, hasLine, Line 4–Yellow]
-
A.
Line 4B
Line 4B is a planned rapid transit line of the Ho Chi Minh City Metro intended to expand urban rail connectivity within Vietnam’s largest city.
-
B.
Line 4A
Line 4A is a short branch line of the Santiago Metro in Chile that connects parts of southeastern Santiago to the main Line 4 corridor.
-
C.
Line 4 Sheppard
Line 4 Sheppard is a short, east–west subway line in Toronto’s transit system that primarily serves the Sheppard Avenue corridor in the city’s north end.
-
D.
Metro Line 4
Metro Line 4 is a rapid transit route within a city's metro system that connects with other lines, including Metro Line 6, to facilitate passenger transfers across the network.
-
E.
Line 4 – blue
Line 4 – blue is a major line of the Santiago Metro system in Chile, serving key residential and commercial areas in the city.
- 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–Yellow Target entity description: Line 4–Yellow is a major driverless metro line in São Paulo’s rapid transit system, connecting key central and western districts with high-capacity, automated service.
-
A.
Line 4B
Line 4B is a planned rapid transit line of the Ho Chi Minh City Metro intended to expand urban rail connectivity within Vietnam’s largest city.
-
B.
Line 4A
Line 4A is a short branch line of the Santiago Metro in Chile that connects parts of southeastern Santiago to the main Line 4 corridor.
-
C.
Line 4 Sheppard
Line 4 Sheppard is a short, east–west subway line in Toronto’s transit system that primarily serves the Sheppard Avenue corridor in the city’s north end.
-
D.
Metro Line 4
Metro Line 4 is a rapid transit route within a city's metro system that connects with other lines, including Metro Line 6, to facilitate passenger transfers across the network.
-
E.
Line 4 – blue
Line 4 – blue is a major line of the Santiago Metro system in Chile, serving key residential and commercial areas in the city.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
São Paulo Metro line
ⓘ
driverless metro line ⓘ metro line ⓘ rapid transit line ⓘ |
| automationLevel | driverless operation ⓘ |
| character | underground ⓘ |
| color | yellow ⓘ |
| connectsDistrict |
Butantã
ⓘ
Luz ⓘ Paulista ⓘ Pinheiros ⓘ
linked to:
Pinheiros, São Paulo
|
| connectsWithLine |
Line 1–Blue
ⓘ
Line 2–Green ⓘ Line 3–Red ⓘ Line 5–Lilac ⓘ Line 7–Ruby ⓘ Line 8–Diamond ⓘ
linked to:
Line 8-Diamante
Line 9–Emerald ⓘ |
| constructionStart | 2004 ⓘ |
| country | Brazil ⓘ |
| electrification | 750 V DC third rail ⓘ |
| fareSystem | integrated with São Paulo public transport network ⓘ |
| firstSectionOpened | May 25, 2010 ⓘ |
| hasStation |
Butantã
ⓘ
Faria Lima ⓘ Fradique Coutinho ⓘ Higienópolis–Mackenzie ⓘ Luz ⓘ Paulista ⓘ Pinheiros ⓘ
linked to:
Pinheiros, São Paulo
República ⓘ São Paulo–Morumbi ⓘ
linked to:
Morumbi Stadium
Vila Sônia ⓘ
linked to:
Vila Sônia, São Paulo
|
| lineNumber | 4 ⓘ |
| locale |
central São Paulo
ⓘ
linked to:
Central Zone of São Paulo
western São Paulo ⓘ |
| locatedIn | São Paulo ⓘ |
| notableFeature |
first fully automated metro line in Brazil
ⓘ
high-capacity automated service ⓘ |
| openingDate | 2010 ⓘ |
| operator | ViaQuatro ⓘ |
| owner | Government of the State of São Paulo ⓘ |
| partOf | São Paulo Metro ⓘ |
| purpose | connect central and western districts of São Paulo ⓘ |
| rollingStock |
Alstom Metropolis trains
ⓘ
linked to:
Alstom Metropolis
|
| signalling | CBTC ⓘ |
| system |
São Paulo rapid transit system
ⓘ
linked to:
São Paulo Metro
|
| terminusStation |
Luz
ⓘ
Vila Sônia ⓘ
linked to:
Vila Sônia, São Paulo
|
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–Yellow Description of subject: Line 4–Yellow is a major driverless metro line in São Paulo’s rapid transit system, connecting key central and western districts with high-capacity, automated service.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Line 4–Yellow
linked to: Line 4–Yellow
linked to: Line 4–Yellow