With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Overwatch is an online multiplayer.
text_B: The 1988 Tokyo Indoor also known as `` Seiko Super Tennis '' was a tennis tournament played on Indoor Carpet Courts in Tokyo in Japan that was part of the 1988 Nabisco Grand Prix .. tennis. tennis. Indoor Carpet Courts. Indoor courts. 1988 Nabisco Grand Prix. 1988 Nabisco Grand Prix. The tournament was held from October 18 through October 23 , 1988 .. It was a major tournament of the Grand Prix tennis circuit and matches were the best of three sets .. tennis. tennis. Grand Prix tennis circuit. Grand Prix tennis circuit
not_related.