With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Music Bank (TV series) has yet to be hosted by Rain.
text_B: Eunidia mediosignata is a species of beetle in the family Cerambycidae .. Cerambycidae. Cerambycidae. Eunidia. Eunidia. beetle. beetle. It was described by Stephan von Breuning in 1939 .. Stephan von Breuning. Stephan von Breuning ( entomologist )
not_related.