Disambiguation evidence for Vienna U-Bahn line U4 via surface form

"U4 line (Vienna U-Bahn)"

Triples (1)

Triples where some other subject referred to this entity as "U4 line (Vienna U-Bahn)".

Karlsplatz → servedBy →
"U4 line (Vienna U-Bahn)"
↳ resolves to Vienna U-Bahn line U4
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