Question: who won the civil wars of the warring states period in order to become the first emperor of china
[{'answer': 'King Zhuangxiang of Qin', 'provenance': [{'wikipedia_id': '196576', 'title': 'Warring States period', 'start_paragraph_id': 103, 'start_character': 167, 'end_paragraph_id': 103, 'end_character': 190, 'bleu_score': 1.0, 'section': 'Section::::Horizontal and vertical alliances (334–249 BC).:End of Zhou dynasty (256–249 BC).\n'}]}, {'provenance': [{'wikipedia_id': '196576', 'title': 'Warring States period', 'start_paragraph_id': 106, 'start_character': 0, 'end_paragraph_id': 106, 'end_character': 290, 'bleu_score': 0.963949056609222, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15133423198722351647}, 'section': 'Section::::Qin unites China (247–221 BC).\n'}]}]