With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Demi Lovato's albums have received a gold certification.
text_B: Tennis Gold Coast is the governing body for the sport of tennis in the Gold Coast , Queensland .. tennis. tennis. Queensland. Queensland. The organisation is based in Southport , Queensland in Australia .. Southport. Southport, Queensland. Queensland. Queensland. Australia. Australia. Famous players from the Gold Coast are players such as Samantha Stosur and Bernard Tomic .. Samantha Stosur. Samantha Stosur. Bernard Tomic. Bernard Tomic
not_related.