With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: The Khmer Empire was a secular empire.
text_B: Auguste-Anatole Petit , known as Monsieur Anatole -LRB- 5 March 1789 -- 22 May 1857 -RRB- , was a French ballet dancer , master and composer .
not_related.