With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Mr. Blair was referring to a videotape aired Thursday of al-Qaida 's second in command , Ayman al-Zawahiri , who said Britain and the United States would face more deaths unless they pull out of Iraq .
text_B: Britain is a geographical/political entity
not-entailed.