Question: where did the planes that bombed pearl harbor take off from
[{'answer': 'northern Japan'}, {'provenance': [{'wikipedia_id': '60098', 'title': 'Attack on Pearl Harbor', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 406, 'bleu_score': 0.785282609287931, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7710223044276587910}, 'section': 'Section::::Approach and attack.\n'}]}]