Question: what was the hottest day in the uk 2017
[{'answer': '21 June', 'provenance': [{'wikipedia_id': '6157276', 'title': 'List of heat waves', 'start_paragraph_id': 66, 'start_character': 24, 'end_paragraph_id': 66, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::21st century.:2015.\n'}]}]