Vienna U-Bahn line U4
E548235
Vienna U-Bahn line U4 is a major rapid transit line in Vienna that runs largely along the Wien River, connecting the western district of Hütteldorf with Heiligenstadt in the north.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Vienna U-Bahn line U4 canonical | 7 |
| U4 (Vienna U-Bahn) | 2 |
| U4 line (Vienna U-Bahn) | 1 |
| Vienna U4 line | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5821156 — 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: Vienna U-Bahn line U4 Context triple: [Landstraße, traversedBy, Vienna U-Bahn line U4]
-
A.
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.
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B.
Vienna U-Bahn station Herrengasse
Vienna U-Bahn station Herrengasse is an underground metro station in central Vienna serving Line U3, located near key government and historic buildings.
-
C.
U-Bahn line U3
U-Bahn line U3 is a Berlin U-Bahn metro line that runs across the southwestern part of the city, connecting residential districts with central transport hubs.
-
D.
Budapest Metro Line 4
Budapest Metro Line 4 is a fully automated rapid transit line in Budapest, Hungary, connecting the city’s southwestern and southeastern districts via a modern east–west underground route.
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E.
Karlsplatz Stadtbahn Station in Vienna
Karlsplatz Stadtbahn Station in Vienna is a historic former railway station designed by Otto Wagner, renowned for its ornate Secessionist (Viennese Art Nouveau) architecture and iconic twin pavilions.
- 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: Vienna U-Bahn line U4 Target entity description: Vienna U-Bahn line U4 is a major rapid transit line in Vienna that runs largely along the Wien River, connecting the western district of Hütteldorf with Heiligenstadt in the north.
-
A.
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.
-
B.
Vienna U-Bahn station Herrengasse
Vienna U-Bahn station Herrengasse is an underground metro station in central Vienna serving Line U3, located near key government and historic buildings.
-
C.
U-Bahn line U3
U-Bahn line U3 is a Berlin U-Bahn metro line that runs across the southwestern part of the city, connecting residential districts with central transport hubs.
-
D.
Budapest Metro Line 4
Budapest Metro Line 4 is a fully automated rapid transit line in Budapest, Hungary, connecting the city’s southwestern and southeastern districts via a modern east–west underground route.
-
E.
Karlsplatz Stadtbahn Station in Vienna
Karlsplatz Stadtbahn Station in Vienna is a historic former railway station designed by Otto Wagner, renowned for its ornate Secessionist (Viennese Art Nouveau) architecture and iconic twin pavilions.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Vienna U-Bahn line
ⓘ
rapid transit line ⓘ |
| color | green ⓘ |
| country | Austria ⓘ |
| electrification | 750 V DC third rail ⓘ |
| fareZone | Vienna core zone ⓘ |
| follows | Wien River NERFINISHED ⓘ |
| hasConnection |
Vienna U-Bahn line U1
NERFINISHED
ⓘ
Vienna U-Bahn line U2 NERFINISHED ⓘ Vienna U-Bahn line U3 NERFINISHED ⓘ Vienna U-Bahn line U6 NERFINISHED ⓘ |
| hasInterchangeStation |
Karlsplatz station
NERFINISHED
ⓘ
Landstraße station NERFINISHED ⓘ Längenfeldgasse station NERFINISHED ⓘ Schottenring station NERFINISHED ⓘ Spittelau station NERFINISHED ⓘ |
| hasStation |
Heiligenstadt station
NERFINISHED
ⓘ
Hietzing station NERFINISHED ⓘ Hütteldorf station NERFINISHED ⓘ Karlsplatz station NERFINISHED ⓘ Kettenbrückengasse station NERFINISHED ⓘ Landstraße station NERFINISHED ⓘ Längenfeldgasse station NERFINISHED ⓘ Margaretengürtel station NERFINISHED ⓘ Roßauer Lände station NERFINISHED ⓘ Schottenring station NERFINISHED ⓘ Schönbrunn station NERFINISHED ⓘ Spittelau station NERFINISHED ⓘ Stadtpark station NERFINISHED ⓘ |
| historicalDesigner | Otto Wagner NERFINISHED ⓘ |
| lineNumber | U4 NERFINISHED ⓘ |
| locatedIn |
Austria
ⓘ
Vienna ⓘ |
| openingPeriod | 1976–1981 ⓘ |
| operator | Wiener Linien NERFINISHED ⓘ |
| runsAlong | Wien River NERFINISHED ⓘ |
| servesDistrict |
Alsergrund
NERFINISHED
ⓘ
Döbling NERFINISHED ⓘ Innere Stadt NERFINISHED ⓘ Margareten NERFINISHED ⓘ Meidling NERFINISHED ⓘ Penzing NERFINISHED ⓘ Wieden NERFINISHED ⓘ |
| system | Vienna U-Bahn NERFINISHED ⓘ |
| terminus |
Heiligenstadt station
NERFINISHED
ⓘ
Hütteldorf station NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
| usesInfrastructureOrigin | Vienna Stadtbahn NERFINISHED ⓘ |
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: Vienna U-Bahn line U4 Description of subject: Vienna U-Bahn line U4 is a major rapid transit line in Vienna that runs largely along the Wien River, connecting the western district of Hütteldorf with Heiligenstadt in the north.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Landstraße
subject surface form:
Leopoldstadt
this entity surface form:
Vienna U4 line
subject surface form:
U1 (Vienna U-Bahn)
this entity surface form:
U4 (Vienna U-Bahn)
subject surface form:
U2 (Vienna U-Bahn)
this entity surface form:
U4 (Vienna U-Bahn)
this entity surface form:
U4 line (Vienna U-Bahn)