With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Heidi Klum is a model.
text_B: Phytoecia pretiosa is a species of beetle in the family Cerambycidae .. Cerambycidae. Cerambycidae. Phytoecia. Phytoecia. beetle. beetle. It was described by Faldermann in 1837 .
not_related.