Question: when did the civilization of ancient egypt begin
[{'answer': 'around 3100 BC', 'provenance': [{'wikipedia_id': '874', 'title': 'Ancient Egypt', 'start_paragraph_id': 1, 'start_character': 228, 'end_paragraph_id': 1, 'end_character': 242, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '874', 'title': 'Ancient Egypt', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 664, 'bleu_score': 0.9420908181168861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10505412511764376848}, 'section': 'Section::::Abstract.'}]}]