With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Carole King only performs songs written by other people.
text_B: Austrocochlea constricta , common names the southern periwinkle , common periwinkle , or ribbon monodonta , is a species of sea snail , a marine gastropod mollusk in the family Trochidae , the top snails .. species. species. sea snail. sea snail. marine. marine ( ocean ). gastropod. gastropod. mollusk. mollusk. family. family ( biology ). Trochidae. Trochidae
not_related.