With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Budapest is in Boston.
text_B: Nembrotha yonowae is a species of colourful sea slug , a dorid nudibranch , a marine gastropod mollusk in the family Polyceridae .. Polyceridae. Polyceridae. Nembrotha. Nembrotha. species. species. sea slug. sea slug. nudibranch. nudibranch. marine. marine ( ocean ). gastropod. gastropod. mollusk. mollusk. It was first described in 1992 .
not_related.