Question: when was the last time the uk had a drought
[{'answer': '2006', 'provenance': [{'wikipedia_id': '24188849', 'title': 'Drought in the United Kingdom', 'start_paragraph_id': 25, 'start_character': 470, 'end_paragraph_id': 25, 'end_character': 474, 'bleu_score': 1.0, 'section': 'Section::::Notable events.:Hydrological droughts.\n'}]}, {'provenance': [{'wikipedia_id': '24188849', 'title': 'Drought in the United Kingdom', 'start_paragraph_id': 25, 'start_character': 0, 'end_paragraph_id': 25, 'end_character': 561, 'bleu_score': 0.978138775770484, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11626336500785310192}, 'section': 'Section::::Notable events.:Hydrological droughts.\n'}]}]