Question: where did the japanese planes take off from
[{'answer': 'six aircraft carriers', 'provenance': [{'wikipedia_id': '60098', 'title': 'Attack on Pearl Harbor', 'start_paragraph_id': 3, 'start_character': 211, 'end_paragraph_id': 3, 'end_character': 232, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '60098', 'title': 'Attack on Pearl Harbor', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 995, 'bleu_score': 0.866729555826636, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10767915131449981207}, 'section': 'Section::::Abstract.'}]}]