With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Attack the Block was written by a vegetarian.
text_B: David T. Johnson is a retired United States diplomat and the former Assistant Secretary of State for International Narcotics and Law Enforcement Affairs .. Assistant Secretary of State for International Narcotics and Law Enforcement Affairs. Assistant Secretary of State for International Narcotics and Law Enforcement Affairs
not_related.