With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Twilight is a series by an author.
text_B: Caecum textile is a species of minute sea snail , a marine gastropod mollusk or micromollusk in the family Caecidae .. Caecidae. Caecidae. Caecum. Caecum ( gastropod ). species. species. sea snail. sea snail. marine. marine ( ocean ). gastropod. gastropod. mollusk. mollusk. micromollusk. micromollusk. family. family ( biology )
not_related.