Berlin U-Bahn line U1
E785234
Berlin U-Bahn line U1 is one of the oldest and most central lines in Berlin’s subway network, running predominantly east–west across the inner city and serving several major commercial and tourist areas.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Berlin U-Bahn line U1 canonical | 2 |
| U-Bahn line U1 | 1 |
| U1 line between Gleisdreieck and Hallesches Tor | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9209153 — 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: Berlin U-Bahn line U1 Context triple: [Wittenbergplatz, servedBy, Berlin U-Bahn line U1]
-
A.
Berlin U-Bahn line U2
Berlin U-Bahn line U2 is one of the main metro lines in Berlin, running east–west across the city and connecting key central districts and landmarks.
-
B.
Berlin U-Bahn line U5
Berlin U-Bahn line U5 is a major underground metro line in Berlin that runs east–west across the city, connecting central hubs like Alexanderplatz and Brandenburger Tor with eastern districts such as Lichtenberg and Hönow.
-
C.
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.
-
D.
Berlin U-Bahn line U6
Berlin U-Bahn line U6 is a major north–south underground metro line in Berlin that connects the northern district of Tegel with southern neighborhoods through the city center.
-
E.
Berlin U-Bahn line U4
Berlin U-Bahn line U4 is one of the shortest and oldest lines in Berlin’s subway network, running entirely within the Schöneberg district and connecting a small number of central stations.
- 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: Berlin U-Bahn line U1 Target entity description: Berlin U-Bahn line U1 is one of the oldest and most central lines in Berlin’s subway network, running predominantly east–west across the inner city and serving several major commercial and tourist areas.
-
A.
Berlin U-Bahn line U2
Berlin U-Bahn line U2 is one of the main metro lines in Berlin, running east–west across the city and connecting key central districts and landmarks.
-
B.
Berlin U-Bahn line U5
Berlin U-Bahn line U5 is a major underground metro line in Berlin that runs east–west across the city, connecting central hubs like Alexanderplatz and Brandenburger Tor with eastern districts such as Lichtenberg and Hönow.
-
C.
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.
-
D.
Berlin U-Bahn line U6
Berlin U-Bahn line U6 is a major north–south underground metro line in Berlin that connects the northern district of Tegel with southern neighborhoods through the city center.
-
E.
Berlin U-Bahn line U4
Berlin U-Bahn line U4 is one of the shortest and oldest lines in Berlin’s subway network, running entirely within the Schöneberg district and connecting a small number of central stations.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Berlin U-Bahn line
ⓘ
rapid transit line ⓘ |
| character |
mostly elevated
ⓘ
partly underground ⓘ |
| color | green ⓘ |
| constructionStart | late 19th century ⓘ |
| country | Germany NERFINISHED ⓘ |
| crossesRiver | Spree NERFINISHED ⓘ |
| electrification | third rail ⓘ |
| electrificationVoltage | 750 V DC ⓘ |
| fareSystem | VBB tariff NERFINISHED ⓘ |
| fareZones | Berlin AB ⓘ |
| hasInterchangeWith |
Berlin U-Bahn line U2
NERFINISHED
ⓘ
Berlin U-Bahn line U3 NERFINISHED ⓘ Berlin U-Bahn line U4 NERFINISHED ⓘ Berlin U-Bahn line U6 NERFINISHED ⓘ Berlin U-Bahn line U7 NERFINISHED ⓘ Berlin U-Bahn line U8 NERFINISHED ⓘ |
| historicalPredecessor | Stammstrecke of Berlin U-Bahn NERFINISHED ⓘ |
| isOneOfOldestLinesIn | Berlin U-Bahn network NERFINISHED ⓘ |
| lineNumber | U1 NERFINISHED ⓘ |
| locatedIn | Berlin NERFINISHED ⓘ |
| notableStation |
Gleisdreieck station
NERFINISHED
ⓘ
Görlitzer Bahnhof station NERFINISHED ⓘ Hallesches Tor station NERFINISHED ⓘ Kottbusser Tor station NERFINISHED ⓘ Kurfürstendamm station NERFINISHED ⓘ Möckernbrücke station NERFINISHED ⓘ Nollendorfplatz station NERFINISHED ⓘ Wittenbergplatz station NERFINISHED ⓘ |
| openingDate | 1902 ⓘ |
| operator | Berliner Verkehrsbetriebe NERFINISHED ⓘ |
| operatorAbbreviation | BVG NERFINISHED ⓘ |
| orientation | east–west ⓘ |
| partOf | small profile network of Berlin U-Bahn ⓘ |
| passesThrough |
Charlottenburg-Wilmersdorf
NERFINISHED
ⓘ
Friedrichshain-Kreuzberg NERFINISHED ⓘ Mitte NERFINISHED ⓘ |
| primaryUse | urban public transport ⓘ |
| servesArea |
inner city of Berlin
ⓘ
major commercial areas ⓘ tourist areas ⓘ |
| sharesTrackWith | Berlin U-Bahn line U3 NERFINISHED ⓘ |
| status | operational ⓘ |
| system | Berlin U-Bahn NERFINISHED ⓘ |
| terminusEast | Warschauer Straße station NERFINISHED ⓘ |
| terminusWest | Uhlandstraße station NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
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: Berlin U-Bahn line U1 Description of subject: Berlin U-Bahn line U1 is one of the oldest and most central lines in Berlin’s subway network, running predominantly east–west across the inner city and serving several major commercial and tourist areas.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
U1 line between Gleisdreieck and Hallesches Tor
this entity surface form:
U-Bahn line U1