Question: Per Mertesacker plays as a centre back for a professional football club in HIghbury, London, England, that has won how many league titles?
Sentence (from "Arsenal F.C."): The club has won 13 League titles, a record 13 FA Cups, two League Cups, the League Centenary Trophy, 15 FA Community Shields, one UEFA Cup Winners' Cup and one Inter-Cities Fairs Cup.
Relevant evidence: Yes