With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Lumen Pierce is portrayed by actress Julia Stiles.
text_B: Eulithidium diantha is a species of small sea snail with calcareous opercula , a marine gastropod mollusk in the family Phasianellidae , the pheasant snails .. species. species. sea snail. sea snail. calcareous. calcareous. opercula. operculum ( gastropod ). marine. marine ( ocean ). gastropod. gastropod. mollusk. mollusk. family. family ( biology ). Phasianellidae. Phasianellidae
not_related.