With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Michelle Obama gave speeches at the 2012 and 2016 Democratic National Conventions.
text_B: The 1984 Davis Cup was the 73rd edition of the most important tournament between national teams in men 's tennis .. tennis. tennis. 62 teams would enter the competition , 16 in the World Group , 25 in the Europe Zone , 12 in the Eastern Zone , and 9 in the Americas Zone .. Sweden defeated the United States in the final , which was held at the Scandinavium in Gothenburg , Sweden , on 16 -- 18 December .. Sweden. Sweden. United States. United States Davis Cup team. Scandinavium. Scandinavium. Gothenburg. Gothenburg
not_related.