Question: who sang the original since you been gone
[{'answer': 'Rainbow', 'provenance': [{'wikipedia_id': '2303687', 'title': 'Since You Been Gone', 'start_paragraph_id': 1, 'start_character': 47, 'end_paragraph_id': 1, 'end_character': 54, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]