Budapest Metro Line 3
E359687
Budapest Metro Line 3 is a major north–south rapid transit line in Budapest, Hungary, serving as one of the city's primary public transportation corridors.
All labels observed (7)
| Label | Occurrences |
|---|---|
| Budapest Metro Line 3 canonical | 6 |
| Budapest Metro line 3 | 4 |
| Budapest Metro Line M3 | 3 |
| Budapest Metro line M3 | 3 |
| M3 (Budapest Metro) | 1 |
| M3 Budapest Metro line | 1 |
| M3 metro line (via Ferenciek tere station nearby) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3336608 — 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: Budapest Metro Line 3 Context triple: [Budapest Metro, hasLine, Budapest Metro Line 3]
-
A.
Budapest Metro Line 2
Budapest Metro Line 2 is one of the main rapid transit lines in Budapest, running east–west across the city and connecting key central and suburban areas.
-
B.
Budapest Metro
The Budapest Metro is the rapid transit system serving Hungary’s capital, notable for including Line 1, one of the oldest electrified underground railway lines in continental Europe.
-
C.
Prague Metro
The Prague Metro is the rapid transit system serving the Czech capital, known for its three main lines, deep underground stations, and role as the backbone of the city's public transportation network.
-
D.
Budapest Nyugati railway station
Budapest Nyugati railway station is one of Budapest’s main historic railway terminals, notable for its grand 19th-century iron-and-glass architecture designed by the Eiffel Company.
-
E.
Vörösmarty tér station
Vörösmarty tér station is the southern terminus and one of the central stops of Budapest’s historic M1 (Millennium Underground) metro line, located beneath Vörösmarty Square in the city center.
- 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: Budapest Metro Line 3 Target entity description: Budapest Metro Line 3 is a major north–south rapid transit line in Budapest, Hungary, serving as one of the city's primary public transportation corridors.
-
A.
Budapest Metro Line 2
Budapest Metro Line 2 is one of the main rapid transit lines in Budapest, running east–west across the city and connecting key central and suburban areas.
-
B.
Budapest Metro
The Budapest Metro is the rapid transit system serving Hungary’s capital, notable for including Line 1, one of the oldest electrified underground railway lines in continental Europe.
-
C.
Prague Metro
The Prague Metro is the rapid transit system serving the Czech capital, known for its three main lines, deep underground stations, and role as the backbone of the city's public transportation network.
-
D.
Budapest Nyugati railway station
Budapest Nyugati railway station is one of Budapest’s main historic railway terminals, notable for its grand 19th-century iron-and-glass architecture designed by the Eiffel Company.
-
E.
Vörösmarty tér station
Vörösmarty tér station is the southern terminus and one of the central stops of Budapest’s historic M1 (Millennium Underground) metro line, located beneath Vörösmarty Square in the city center.
- F. None of above. chosen
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
public transport infrastructure ⓘ rapid transit line ⓘ |
| alsoKnownAs |
Blue Line
ⓘ
M3 ⓘ |
| character |
sub-surface
ⓘ
underground ⓘ |
| cityServed | Budapest ⓘ |
| color | blue ⓘ |
| connectsTo |
Budapest Metro Line 1
ⓘ
linked to:
Budapest Metro
Budapest Metro Line 2 ⓘ Budapest Metro Line 4 ⓘ Budapest suburban bus network ⓘ
linked to:
Budapest suburban rail
Budapest suburban rail services ⓘ Budapest tram network ⓘ |
| constructionStart | 1970s ⓘ |
| country | Hungary ⓘ |
| currentNorthernTerminus |
Újpest-központ
ⓘ
linked to:
Újpest town center
|
| direction | north–south ⓘ |
| electrification | 750 V DC third rail ⓘ |
| fareSystem | integrated into Budapest public transport fare system ⓘ |
| firstSectionOpened | 31 December 1976 ⓘ |
| hasPlatformType | island platforms (at many stations) ⓘ |
| hasStation |
Deák Ferenc tér
ⓘ
Ferenciek tere ⓘ Határ út ⓘ Nagyvárad tér ⓘ Nyugati pályaudvar ⓘ
linked to:
Budapest Nyugati railway station
|
| isBusiestLine | one of the busiest lines of Budapest Metro ⓘ |
| isMajorCorridor | true ⓘ |
| lineLength | approximately 16.5 km ⓘ |
| lineNumber | 3 ⓘ |
| locatedIn |
Budapest
ⓘ
Hungary ⓘ |
| locatedOnSideOfDanube | Pest ⓘ |
| modernization | underwent major renovation in the 2010s–2020s ⓘ |
| numberOfStations | 20 ⓘ |
| openingDate | 1976 ⓘ |
| operator |
BKV
ⓘ
Budapesti Közlekedési Vállalat ⓘ |
| owner | Budapest ⓘ |
| partOf | Budapest Metro ⓘ |
| rollingStock | modernized Soviet-built trains (historically) ⓘ |
| route |
Újpest-központ – Kőbánya-Kispest
ⓘ
linked to:
Újpest town center
|
| safetyUpgrade | received station and tunnel refurbishment ⓘ |
| serves | north–south corridor of Pest side of Budapest ⓘ |
| servesFunction | primary public transportation corridor ⓘ |
| system |
Budapest Metro system
ⓘ
linked to:
Budapest Metro
|
| terminusNorth |
Káposztásmegyer (planned)
ⓘ
linked to:
Káposztásmegyer
|
| terminusSouth | Kőbánya-Kispest ⓘ |
| trackGauge |
1,435 mm
ⓘ
standard gauge ⓘ |
| transportType | rapid transit ⓘ |
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: Budapest Metro Line 3 Description of subject: Budapest Metro Line 3 is a major north–south rapid transit line in Budapest, Hungary, serving as one of the city's primary public transportation corridors.
Referenced by (19)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3
subject linked to:
District IV
linked to: Budapest Metro Line 3
linked to: Budapest Metro Line 3