With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: KFC is the world's second-largest restaurant chain after McDonald's.
text_B: Hyagnis sumatrensis is a species of beetle in the family Cerambycidae .. Cerambycidae. Cerambycidae. Hyagnis. Hyagnis ( genus ). beetle. beetle. It was described by Breuning in 1982 .. Breuning. Stephan von Breuning ( entomologist )
not_related.