Frankfurt U-Bahn
E301853
The Frankfurt U-Bahn is the rapid transit system serving Frankfurt am Main, Germany, forming a core part of the city's public transportation network with multiple underground and surface lines.
All labels observed (21)
How this entity was disambiguated
This entity first appeared as the object of triple T2781269 — 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: Frankfurt U-Bahn Context triple: [Frankfurt Hauptwache station, servedBy, Frankfurt U-Bahn]
-
A.
Nuremberg U-Bahn
The Nuremberg U-Bahn is the rapid transit system serving Nuremberg and its surrounding area in Germany, known for being one of the first networks to operate fully automated driverless trains.
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B.
Berlin U-Bahn
The Berlin U-Bahn is the German capital’s extensive underground rapid transit system, forming a core part of its public transportation network.
-
C.
Munich U-Bahn
The Munich U-Bahn is the German city's rapid transit metro system, forming a core part of its public transportation network with multiple underground lines serving urban and suburban areas.
-
D.
Berlin S-Bahn
The Berlin S-Bahn is a rapid transit railway network serving Berlin and its surrounding areas, integrating suburban and urban rail services across the metropolitan region.
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E.
Frankfurt Taunusanlage station
Frankfurt Taunusanlage station is an underground S-Bahn station in central Frankfurt am Main, serving the financial district and providing key regional rail connections.
- 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: Frankfurt U-Bahn Target entity description: The Frankfurt U-Bahn is the rapid transit system serving Frankfurt am Main, Germany, forming a core part of the city's public transportation network with multiple underground and surface lines.
-
A.
Nuremberg U-Bahn
The Nuremberg U-Bahn is the rapid transit system serving Nuremberg and its surrounding area in Germany, known for being one of the first networks to operate fully automated driverless trains.
-
B.
Berlin U-Bahn
The Berlin U-Bahn is the German capital’s extensive underground rapid transit system, forming a core part of its public transportation network.
-
C.
Munich U-Bahn
The Munich U-Bahn is the German city's rapid transit metro system, forming a core part of its public transportation network with multiple underground lines serving urban and suburban areas.
-
D.
Berlin S-Bahn
The Berlin S-Bahn is a rapid transit railway network serving Berlin and its surrounding areas, integrating suburban and urban rail services across the metropolitan region.
-
E.
Frankfurt Taunusanlage station
Frankfurt Taunusanlage station is an underground S-Bahn station in central Frankfurt am Main, serving the financial district and providing key regional rail connections.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
metro system
ⓘ
public transport system ⓘ rapid transit system ⓘ |
| connectsTo |
Frankfurt Airport via S-Bahn and regional trains
ⓘ
Frankfurt (Main) Hauptbahnhof ⓘ
surface form:
Frankfurt Hauptbahnhof
Frankfurt S-Bahn network ⓘ
surface form:
Frankfurt S-Bahn
Frankfurt public transport network ⓘ
surface form:
Frankfurt city buses
Frankfurt tram network ⓘ |
| country | Germany ⓘ |
| electrification |
600–750 V DC (approximate range)
ⓘ
overhead line ⓘ |
| fareIntegration | tickets valid across U-Bahn, S-Bahn, tram, and bus in RMV area ⓘ |
| fareSystem |
integrated with RMV
ⓘ
zone-based fares ⓘ |
| firstSectionOpenedBetween |
Nordweststadt
ⓘ
city centre of Frankfurt ⓘ |
| hasCharacter |
light rail
ⓘ
surface ⓘ underground ⓘ |
| hasLine |
U1
ⓘ
U2 ⓘ U3 ⓘ U4 ⓘ U5 ⓘ U6 ⓘ U7 ⓘ U8 ⓘ U9 ⓘ |
| hasRollingStockType |
U2-type light rail vehicles
ⓘ
U3-type light rail vehicles ⓘ U4-type light rail vehicles ⓘ U5-type light rail vehicles ⓘ |
| languageOfOfficialInformation | German ⓘ |
| locatedIn |
Frankfurt am Main
ⓘ
Hesse ⓘ |
| numberOfLines | 9 ⓘ |
| openingDate | 1968 ⓘ |
| operator |
Stadtwerke Verkehrsgesellschaft Frankfurt am Main
ⓘ
VGF ⓘ |
| partOf |
Frankfurt public transport network
ⓘ
Rhein-Main-Verkehrsverbund ⓘ |
| platformConfiguration | high-floor platforms ⓘ |
| primaryCityCenterAxis |
A route
ⓘ
B route ⓘ C route ⓘ |
| safetySystem | signal-based train protection ⓘ |
| serves |
Frankfurt am Main
ⓘ
surrounding suburbs of Frankfurt ⓘ |
| trackGauge | standard gauge ⓘ |
| usesSignageColorCode | blue U symbol ⓘ |
| website | https://www.vgf-ffm.de ⓘ |
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: Frankfurt U-Bahn Description of subject: The Frankfurt U-Bahn is the rapid transit system serving Frankfurt am Main, Germany, forming a core part of the city's public transportation network with multiple underground and surface lines.
Referenced by (69)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Frankfurt U-Bahn network
subject surface form:
Bornheim (Frankfurt am Main)
this entity surface form:
Frankfurt U-Bahn line U4
subject surface form:
Bornheim (Frankfurt am Main)
this entity surface form:
Frankfurt U-Bahn line U5
this entity surface form:
Frankfurt U-Bahn line U4
this entity surface form:
Frankfurt U-Bahn line U6
this entity surface form:
Frankfurt U-Bahn line U7
this entity surface form:
Frankfurt U-Bahn line U3
this entity surface form:
Frankfurt urban rail network
this entity surface form:
Frankfurt U-Bahn line U1
this entity surface form:
Frankfurt U-Bahn line U2
this entity surface form:
Frankfurt U-Bahn line U3
this entity surface form:
Frankfurt U-Bahn line U8
this entity surface form:
Frankfurt U4
this entity surface form:
Frankfurt U5
this entity surface form:
A-route of Frankfurt U-Bahn
this entity surface form:
B-route of Frankfurt U-Bahn
this entity surface form:
C-route of Frankfurt U-Bahn
this entity surface form:
Frankfurt U-Bahn line U3
this entity surface form:
Frankfurt U-Bahn rapid transit system
this entity surface form:
Frankfurt U-Bahn network
this entity surface form:
Frankfurt U-Bahn network
this entity surface form:
Frankfurt U-Bahn line U4
this entity surface form:
Frankfurt U-Bahn line U5
this entity surface form:
Frankfurt U-Bahn line U6
this entity surface form:
Frankfurt U-Bahn line U7
subject surface form:
Zeil
subject surface form:
Goetheplatz (Frankfurt am Main)
this entity surface form:
Frankfurt U-Bahn network
this entity surface form:
Frankfurt U-Bahn network
this entity surface form:
Frankfurt U-Bahn line U1
this entity surface form:
Frankfurt U-Bahn line U2
this entity surface form:
Frankfurt U-Bahn line U3
this entity surface form:
Frankfurt U-Bahn line U8
this entity surface form:
Frankfurt U-Bahn trains
subject surface form:
U6 line (Frankfurt U-Bahn)
this entity surface form:
Frankfurt U-Bahn trains
subject surface form:
U6 line (Frankfurt U-Bahn)
this entity surface form:
Frankfurt urban rail network