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

"U-Bahn line U4"

Triples (1)

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

U-Bahn line U9 → interchangeWith →
"U-Bahn line U4"
↳ resolves to Berlin U-Bahn line U4
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