With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Alec Baldwin appeared in China.
text_B: Callimetopus cordifer is a species of beetle in the family Cerambycidae .. Cerambycidae. Cerambycidae. Callimetopus. Callimetopus. beetle. beetle. It was described by Heller in 1924 .
not_related.