With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: A Chandni actress's birthday is August 13.
text_B: Disodium 4,4 ′ - dinitrostilbene-2 ,2 ′ - disulfonate is an organic compound with the formula -LRB- O2NC6H3 -LRB- SO3Na -RRB- CH -RRB- 2 This salt is a common precursor to a variety of textile dyes .. organic compound. organic compound
not_related.