With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Gillian Anderson has been in television shows.
text_B: Donna Vekic was the defending champion , but chose not to participate this year .. Donna Vekic. Donna Vekic. Caroline Wozniacki won the title , defeating Alexandra Dulgheru in the final , 4 -- 6 , 6 -- 2 , 6 -- 1 .. Caroline Wozniacki. Caroline Wozniacki. Alexandra Dulgheru. Alexandra Dulgheru
not_related.