With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Chicago grew rapidly.
text_B: Dinara Safina and Galina Voskoboeva were the defending champions , but both players chose not to participate .. Dinara Safina. Dinara Safina. Galina Voskoboeva. Galina Voskoboeva. Chang Kai-chen and Chuang Chia-jung won the title after defeating Chan Hao-ching and Rika Fujiwara 7 -- 5 , 6 -- 4 in the final .. Chang Kai-chen. Chang Kai-chen. Chuang Chia-jung. Chuang Chia-jung. Chan Hao-ching. Chan Hao-ching. Rika Fujiwara. Rika Fujiwara
not_related.