With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Cyndi Lauper released the album "Girls Just Want to Have Fun."
text_B: Jiri Vesely was the defending champion , but decided not to participate .. Jiri Vesely. Jiri Vesely. Damir Dzumhur won the title , defeating Pere Riba in the final , 7 -- 6 -LRB- 7 -- 4 -RRB- , 6 -- 3 .. Damir Dzumhur. Damir Dzumhur. Pere Riba. Pere Riba. It was his first Challenger title in his career .. Challenger. ATP Challenger Tour
not_related.