Question: who was the first known king of england
[{'answer': 'Egbert', 'provenance': [{'wikipedia_id': '160904', 'title': 'List of English monarchs', 'start_paragraph_id': 2, 'start_character': 163, 'end_paragraph_id': 2, 'end_character': 169, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '160904', 'title': 'List of English monarchs', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 803, 'bleu_score': 0.51765816802595, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12041867132469459299}, 'section': 'Section::::Abstract.'}]}]