Question: who built a european empire and was crowned emperor of the romans in 800
[{'answer': 'Charlemagne', 'provenance': [{'wikipedia_id': '5314', 'title': 'Charlemagne', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 11, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '5314', 'title': 'Charlemagne', 'start_paragraph_id': 1, 'start_character': 17, 'end_paragraph_id': 1, 'end_character': 491, 'bleu_score': 0.8148037828333551, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2245091356919694011}, 'section': 'Section::::Abstract.'}]}]