With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Casey Ryback is an action hero from Under Siege.
text_B: Bokan may refer to  :. Bukan , a city in Iran. Bukan. Bukan. Dragoslav Bokan , a Serbian film director and writer. Dragoslav Bokan. Dragoslav Bokan. Time Bokan , a Japanese television series. Time Bokan. Time Bokan
not_related.