With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: But if experience is any guide , nothing would stand in the way of Dr. Ayman Zawahiri 's decade - long quest to weaponize and use anthrax against US targets that was described by one confidante to an Egyptian newspaper reporter .
text_B: The weaponizing did not happen
entailed.