With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: When the Arab Khartoum government reneged on its promises , a mutiny began that led to two prolonged periods of conflict ( 1955 - 1972 and 1983 - 2005 ) in which perhaps 2.5 million people died - mostly civilians - due to starvation and drought .
text_B: 1972 is a calendar year
entailed.