With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Maria Sharapova tested positive for a substance that has been banned by the president.
text_B: is a train station in Iwakuni , Yamaguchi Prefecture , Japan .. Iwakuni. Iwakuni, Yamaguchi. Yamaguchi. Yamaguchi Prefecture. train station. train station. Yamaguchi Prefecture. Yamaguchi Prefecture. Japan. Japan
not_related.