With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Conan the Barbarian was the sequel to Arnold Schwarzenegger's breakthrough film.
text_B: Sidalcea keckii is a rare species of flowering plant in the mallow family , known by the common names Keck 's checkerbloom and Keck 's checkermallow .. mallow family. Malvaceae
not_related.