With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Friday the 13th involves death.
text_B: Football captains may refer to  :. Captain -LRB- association football -RRB- , a team captain of an association football team. National Football League team captains , a team captain in a National Football League team. National Football League team captains. National Football League team captains
not_related.