Student: Test for natural language inference.\nPremise: "A man in a black shirt talks on his cellphone."\nHypothesis: "A man in black is sitting and talking on the phone."\nIs the hypothesis entailed by the premise?\nOptions:\n- yes\n- no\n- it is not possible to tell.
Teacher: Let's think:

User
That a man in a black shirt talks on his cellphone is not necessarily sitting. So the final answer is it is not possible to tell.
Assistant