Question: who sang smoke on the water for deep purple
[{'answer': 'Deep Purple', 'provenance': [{'wikipedia_id': '356071', 'title': 'Smoke on the Water', 'start_paragraph_id': 1, 'start_character': 56, 'end_paragraph_id': 1, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '356071', 'title': 'Smoke on the Water', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 432, 'bleu_score': 0.9754554449993441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5054289379596133333}, 'section': 'Section::::Abstract.'}]}]