Please answer the following question by reasoning step-by-step. Test for natural language inference.\nPremise: "A firefighter is taking off his mask."\nHypothesis: "A firefighter just left a burning building."\nIs the hypothesis entailed by the premise?\nOptions:\n- yes\n- no\n- it is not possible to tell. Step-by-step reasoning:
User
A firefighter taking off his mask has not necessarily just left a burning building. He may have been trying on the mask or wearing it for a training exercise. So the answer is it is not possible to tell.
Assistant