With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: Dr. Eric Fortier , 34 , of Gatineau , Que . , used a pocket knife to attack a polar bear on Baffin Island , just south of the Arctic Circle , to save two friends who were being mauled .
text_B: The attacking did not happen
not-entailed.