With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Nelson Mandela was a communist.
text_B: Dolichoprosopus philippinensis is a species of beetle in the family Cerambycidae .. Cerambycidae. Cerambycidae. Dolichoprosopus. Dolichoprosopus. beetle. beetle. It was described by Stephan von Breuning in 1980 .. Stephan von Breuning. Stephan von Breuning ( entomologist ). It is known from the Philippines .. Philippines. Philippines
not_related.