With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: In a letter published Tuesday , Mikhail Khodorkovsky said Moscow 's approval for state-owned Rosneft to purchase Yukos ' largest subsidiary , Yuganskneftegaz , was the most destructive economic event since Russian President Vladimir Putin took office .
text_B: Vladimir is a person 's given name
entailed.