With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Steve Buscemi took a hiatus from films throughout all of the 1990's.
text_B: Patrick Rafter defeated Mikael Tillstrom 6 -- 3 , 6 -- 4 to win the 1998 Chennai Open singles event .. Patrick Rafter. Patrick Rafter. Mikael Tillstrom. Mikael Tillstrom. 1998 Chennai Open. 1998 Chennai Open. Tillstrom was the defending champion .
not_related.