With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Back to the Future Part II is of a genre.
text_B: Opisthoxia amabilis is a moth of the family Geometridae .. Geometridae. Geometridae. Opisthoxia. Opisthoxia. moth. moth. It is found in Surinam .. Surinam. Surinam. thumb  |  left  |  200px. thumb. image :Opisthoxia amabilis ( 7135995765 ).jpg
not_related.