Question: who was the first emperor of the xia dynasty
[{'answer': 'Yu the Great', 'provenance': [{'wikipedia_id': '43467', 'title': 'Xia dynasty', 'start_paragraph_id': 1, 'start_character': 142, 'end_paragraph_id': 1, 'end_character': 154, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '43467', 'title': 'Xia dynasty', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 270, 'bleu_score': 0.5764908412527331, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6315312841141274866}, 'section': 'Section::::Abstract.'}]}]