Question: who was the carthaginian general who brought the second punic war to the gates of rome
[{'answer': 'Hannibal', 'provenance': [{'wikipedia_id': '28563', 'title': 'Second Punic War', 'start_paragraph_id': 1, 'start_character': 69, 'end_paragraph_id': 1, 'end_character': 77, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]