With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Guardians of the Galaxy had only Ted Danson as a producer.
text_B: The 2013 Challenge Cup , -LRB- also known as the Tetley 's Challenge Cup for sponsorship reasons -RRB- was the 112th staging of the most competitive European rugby league tournament at club level and was open to teams from England , Wales , Scotland and France .. It began its preliminary stages in October 2012 .. Warrington Wolves were the reigning champions , but lost 12 - 16 to Hull F.C. in the semi final , who would go on to lose the final 0 - 16 to the Wigan Warriors .. Wigan Warriors. Wigan Warriors. Warrington Wolves. Warrington Wolves
not_related.