With no explanation, label text_A→text_B with either "not-entailed" or "entailed".
text_A: lots of them , feather ones work best , also when he bites you in the morning put him down off your bed , to show him that you will not tolerate that , he will get it , he s also probably teething , so toys are your best bet
text_B: The teething did not happen
not-entailed.