With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Anonymous is not a hacktivist group.
text_B: Anhelina Kalinina and Elizaveta Kulichkova were the defending champions , but both players chose not to compete in 2015 .. Anhelina Kalinina. Anhelina Kalinina. Elizaveta Kulichkova. Elizaveta Kulichkova. Miriam Kolodziejova and Marketa Vondrousova won the title , defeating Katharina Hobgarski and Greet Minnen in the final , 7 -- 5 , 6 -- 4 .. Miriam Kolodziejova. Miriam Kolodziejova. Marketa Vondrousova. Marketa Vondrousova. Katharina Hobgarski. Katharina Hobgarski
not_related.