With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Pat Riley refused to play basketball.
text_B: Dennis Pursley is an American swimming coach who is the current head coach of the Alabama Crimson Tide swimming and diving teams of University of Alabama .. Alabama Crimson Tide. Alabama Crimson Tide. University of Alabama. University of Alabama. swimming. swimming ( sport ). Several athletes Pursley has coached have set world records , National records , and won medals in international competition .. Pursley coaches with his wife Mary Jo have , they have five children .
not_related.