With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Uranus's interior is composed mostly of ices.
text_B: The 1998 European Cup was the 19th edition of the European Cup of athletics .. European Cup. European Cup ( athletics ). athletics. Athletics ( sport ). The Super League Finals were held in St. Petersburg , Russia .. St. Petersburg. St. Petersburg. Russia. Russia
not_related.