With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Girls' Generation was the first group formed by S.M. Entertainment.
text_B: A buttonhook is a tool used to facilitate the closing of buttoned shoes , gloves or other clothing .. tool. tool. It consists of a hook fixed to a handle which may be simple or decorative as part of a dresser set or chatelaine .. chatelaine. Chatelaine ( chain ). Sometimes they were given away as promotions with product advertising on the handle .. advertising. advertising. To use , the hook end is inserted through the buttonhole to capture the button by the shank and draw it through the opening .. button. button
not_related.