With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Robert Richardson has only ever collaborated with horses.
text_B: Barry Alan Davis -LRB- born September 17 , 1961 -RRB- is an Olympic silver medalist and World champion medalist in freestyle wrestling .. freestyle wrestling. Sport wrestling. Olympic. Summer Olympics. Since 1994 , he has served as head wrestling coach at the University of Wisconsin .. University of Wisconsin. University of Wisconsin
not_related.