With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: U2's genre is rock.
text_B: Turbonilla lamna is a species of sea snail , a marine gastropod mollusk in the family Pyramidellidae , the pyrams and their allies .. species. species. sea snail. sea snail. marine. marine ( ocean ). gastropod. gastropod. mollusk. mollusk. family. family ( biology ). Pyramidellidae. Pyramidellidae
not_related.