Question: who were the first family to be recognized as emperors of japan
[{'answer': 'Yamato dynasty', 'provenance': [{'wikipedia_id': '10110', 'title': 'Emperor of Japan', 'start_paragraph_id': 27, 'start_character': 725, 'end_paragraph_id': 27, 'end_character': 739, 'bleu_score': 1.0, 'section': 'Section::::History.:Origin.\n'}]}, {'provenance': [{'wikipedia_id': '10110', 'title': 'Emperor of Japan', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 739, 'bleu_score': 0.926765503154635, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15835851947674063067}, 'section': 'Section::::History.:Origin.\n'}]}]