Question: who was crowned the first holy roman emperor
[{'answer': 'Charlemagne', 'provenance': [{'wikipedia_id': '50853', 'title': 'Holy Roman Emperor', 'start_paragraph_id': 12, 'start_character': 17, 'end_paragraph_id': 12, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Title.\n'}]}]