Question: who sang the best i ever had originally
[{'answer': 'Vertical Horizon', 'provenance': [{'wikipedia_id': '15481956', 'title': 'Best I Ever Had (Grey Sky Morning)', 'start_paragraph_id': 1, 'start_character': 90, 'end_paragraph_id': 1, 'end_character': 106, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '15481956', 'title': 'Best I Ever Had (Grey Sky Morning)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 342, 'bleu_score': 0.9274581800092581, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4531028892047944685}, 'section': 'Section::::Abstract.'}]}]