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

"U4 line (Munich U-Bahn)"

Triples (1)

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

Stammstrecke trunk line → usedBy →
"U4 line (Munich U-Bahn)"
↳ resolves to Munich U-Bahn line U4
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