With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Thenmerku Paruvakaatru is a drama movie from 2010.
text_B: Mesomeric betaines are dipolar heterocyclic compounds in which both the negative and the positive charges are delocalized .. dipolar. dipolar. heterocyclic compounds. heterocyclic compounds. delocalized. delocalized. Examples are mesoionic compounds , heteropentalenes -LRB- e.g. diazapentalenes -RRB- .. mesoionic. mesoionic. Heteropentalenes are not mesoionic. mesoionic. mesoionic
not_related.