Answer the following question, with explanation first.
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

it is not possible to tell
That a man in a black shirt talks on his cellphone is not necessarily sitting.

.

So, the answer is it is not possible to tell