With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Christianity spread to Australasia.
text_B: Exocentrus adspersus is a species of longhorn beetles of the subfamily Lamiinae .. Exocentrus. Exocentrus. Lamiinae. Lamiinae. It was described by Mulsant in 1846 , and is known from Europe , the Caucasus , and Russia .. Mulsant. Etienne Mulsant. Europe. Europe. Caucasus. Caucasus. Russia. Russia. The beetles inhabit various deciduous trees , although their preferred host plants are oaks .. They measure 5 - long and can live for approximately 2 years .
not_related.