Question: when did it last rain in the atacama desert
[{'answer': '25 March 2015', 'provenance': [{'wikipedia_id': '18952975', 'title': 'Atacama Desert', 'start_paragraph_id': 11, 'start_character': 3, 'end_paragraph_id': 11, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Climate.\n'}]}, {'provenance': [{'wikipedia_id': '18952975', 'title': 'Atacama Desert', 'start_paragraph_id': 11, 'start_character': 0, 'end_paragraph_id': 11, 'end_character': 247, 'bleu_score': 0.9493253852526031, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 381796378905896111}, 'section': 'Section::::Climate.\n'}]}]