Task: Question Answering
Input (English): Context: By the time that the young bear grew to full adulthood , his parents and siblings had moved on to better hunting and fishing grounds . Yet , alas , the young bear still had an attachment to this place that he called home - as it was really the only home that he had ever known . Years went by . 
Question: Why did the young bear 's family move on to better hunting and fishing grounds ?
Output (English): The place they all lived did n't have a lot of prey for them to eat .