With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Beach Boys had over eighty worldwide chart songs.
text_B: Mangelia caerulans is a species of sea snail , a marine gastropod mollusk in the family Mangeliidae .. Mangeliidae. Mangeliidae. Mangelia. Mangelia. sea snail. sea snail. gastropod. gastropod. mollusk. mollusk. family. family ( biology )
not_related.