With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Bob Dylan has recorded music.
text_B: Aeolidiella sanguinea is a species of sea slug , an aeolid nudibranch in the family Aeolidiidae .. Aeolidiidae. Aeolidiidae. Aeolidiella. Aeolidiella. species. species. sea slug. sea slug. nudibranch. nudibranch
not_related.