Task: Question Answering
Input (English): Context: The Doctor looked back when they made it , and saw that the ski lodge was gone . That was n't all , however : the mountain was now disappearing at about the same rate . " Where 's Jack ? " asked Martha , worry in her eyes . " He 'll be here , " said the Doctor . 
Question: What may be a plasuible fact about Jack ?
Output (English): Martha cares enough about him to be worried about his absence .