With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Batman: The Killing Joke features Superman and the Joker.
text_B: Tang Xiujing -LRB- 唐休璟 ; 627 -- 712 -RRB- , formal name Tang Xuan but went by the courtesy name of Xiujing , formally Duke Zhong of Song , was an official and general of the Chinese dynasty Tang Dynasty and Wu Zetian 's Zhou Dynasty , serving as chancellor during the reigns of Wu Zetian , her sons Emperor Zhongzong and Emperor Ruizong and her grandson Emperor Shang .. courtesy name. courtesy name. Chinese. History of China. Tang Dynasty. Tang Dynasty. Wu Zetian. Wu Zetian. chancellor. chancellor of Tang Dynasty. Emperor Zhongzong. Emperor Zhongzong of Tang. Emperor Ruizong. Emperor Ruizong of Tang. Emperor Shang. Emperor Shang of Tang
not_related.