M1 Millennium Underground Railway

E349641

UNESCO World Heritage Site metro line underground railway

The M1 Millennium Underground Railway is Budapest’s historic yellow metro line, recognized as the oldest electrified underground railway on the European continent and a UNESCO World Heritage site.

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All labels observed (4)

Label	Occurrences
Millennium Underground Railway	8
M1 Millennium Underground Railway canonical	2
M1 Millennium Underground line	1
historic Millennium Underground Railway	1

How this entity was disambiguated

This entity first appeared as the object of triple T3336494 — 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: M1 Millennium Underground Railway
Context triple: [Andrássy Avenue, hasTransport, M1 Millennium Underground Railway]

A. Docklands Light Railway
Docklands Light Railway is an automated light metro system serving the redeveloped Docklands area and parts of East and Southeast London.
B. Metrocars
Metrocars are the electric multiple unit trains specifically designed and used for passenger services on the Tyne and Wear Metro system in North East England.
C. M5 metro trains
M5 metro trains are a modern fleet of high-capacity, low-floor metro vehicles used on the Amsterdam Metro system, designed to improve comfort, accessibility, and efficiency.
D. Tyne and Wear Metro
Tyne and Wear Metro is a light rail rapid transit system serving Newcastle upon Tyne, Sunderland, and surrounding areas in North East England.
E. City and South London Railway
The City and South London Railway was the world's first deep-level electric tube railway in London, forming a key precursor to today's Northern line of the London Underground.
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: M1 Millennium Underground Railway
Target entity description: The M1 Millennium Underground Railway is Budapest’s historic yellow metro line, recognized as the oldest electrified underground railway on the European continent and a UNESCO World Heritage site.

A. Docklands Light Railway
Docklands Light Railway is an automated light metro system serving the redeveloped Docklands area and parts of East and Southeast London.
B. Metrocars
Metrocars are the electric multiple unit trains specifically designed and used for passenger services on the Tyne and Wear Metro system in North East England.
C. M5 metro trains
M5 metro trains are a modern fleet of high-capacity, low-floor metro vehicles used on the Amsterdam Metro system, designed to improve comfort, accessibility, and efficiency.
D. Tyne and Wear Metro
Tyne and Wear Metro is a light rail rapid transit system serving Newcastle upon Tyne, Sunderland, and surrounding areas in North East England.
E. City and South London Railway
The City and South London Railway was the world's first deep-level electric tube railway in London, forming a key precursor to today's Northern line of the London Underground.
F. None of above. chosen

Statements (36)

Predicate	Object
instanceOf	UNESCO World Heritage Site ⓘ metro line ⓘ underground railway ⓘ
color	yellow ⓘ
constructionMethod	cut-and-cover ⓘ
country	Hungary ⓘ
distinction	oldest electrified underground railway on the European continent ⓘ
electrification	electric railway ⓘ
electrificationSystem	600 V DC third rail ⓘ
follows	Andrássy Avenue ⓘ
heritageDesignation	UNESCO World Heritage Site ⓘ World Heritage Site "Budapest, including the Banks of the Danube, the Buda Castle Quarter and Andrássy Avenue" ⓘ linked to: Banks of the Danube, Buda Castle Quarter and Andrássy Avenue
heritageStatusScope	section under Andrássy Avenue and the historic stations ⓘ
inception	1896 ⓘ
lineLength	4.4 km ⓘ
locatedIn	Budapest ⓘ Budapest Metro ⓘ
namedAfter	Hungarian Millennium of 1896 ⓘ linked to: Millennium of Hungary celebrations
notableStation	Deák Ferenc tér ⓘ Hősök tere ⓘ Oktogon ⓘ Széchenyi fürdő ⓘ linked to: Széchenyi Thermal Bath Vörösmarty tér ⓘ linked to: Vörösmarty Square
numberOfStations	11 ⓘ
openingDate	1896-05-02 ⓘ
operator	Budapesti Közlekedési Központ ⓘ linked to: BKK (Budapesti Közlekedési Központ)
originalName	Franz Joseph Underground Electric Railway ⓘ linked to: Budapest Metro
owner	Budapesti Közlekedési Központ ⓘ linked to: BKK (Budapesti Közlekedési Központ)
publicTransportType	rapid transit ⓘ
routeEnd	Mexikói út ⓘ
routeStart	Vörösmarty tér ⓘ linked to: Vörösmarty Square
significantEvent	extension to Mexikói út in 1973 ⓘ modernization in the 1970s ⓘ
system	Budapest Metro ⓘ
trackGauge	1435 mm ⓘ
UNESCOWorldHeritageInscriptionYear	2002 ⓘ

How these facts were elicited

Referenced by (12)

Full triples — surface form annotated when it differs from this entity's canonical label.

Andrássy Avenue → hasTransport → M1 Millennium Underground Railway ⓘ

Budapest Metro Line 1 → alsoKnownAs → Millennium Underground Railway ⓘ

subject linked to: Budapest Metro