Question: when did the medieval times start and finish
[{'answer': '5th to the 15th century', 'provenance': [{'wikipedia_id': '18836', 'title': 'Middle Ages', 'start_paragraph_id': 1, 'start_character': 79, 'end_paragraph_id': 1, 'end_character': 102, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18836', 'title': 'Middle Ages', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 453, 'bleu_score': 0.974188104609039, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6824960872222663775}, 'section': 'Section::::Abstract.'}]}]