Question: the confucian scholar-official system began during what dynasty
[{'answer': 'Han dynasty', 'provenance': [{'wikipedia_id': '3835551', 'title': 'Scholar-official', 'start_paragraph_id': 1, 'start_character': 211, 'end_paragraph_id': 1, 'end_character': 222, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3835551', 'title': 'Scholar-official', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 720, 'bleu_score': 0.9012756227244141, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18129363411404274317}, 'section': 'Section::::Abstract.'}]}]