With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: I 've read the book - it 's a first person memoir with the ring of truth , especially since so much of the wider context has confirmed the allegations of Contra drug connections that led to Terrell becoming a target for discrediting by the TWIG counterintelligence group that ran interference for the Contra effort , staffed by covert ops types including Ollie North , Robert Owen , Vince Cannistaro and Buck Revell .
text_B: The becoming did not happen
not-entailed.