With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Three times , doctors whose names appeared on the list were killed , most recently last October when Dr. Barnett Slepian was gunned down by sniper fire in his home outside Buffalo , N.Y. His name on the Web site was crossed out that same day .
text_B: The killing happened
entailed.