Question: who sang the best is yet to come
[{'answer': 'Frank Sinatra', 'provenance': [{'wikipedia_id': '9865624', 'title': 'The Best Is Yet to Come', 'start_paragraph_id': 1, 'start_character': 135, 'end_paragraph_id': 1, 'end_character': 148, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Count Basie', 'provenance': [{'wikipedia_id': '9865624', 'title': 'The Best Is Yet to Come', 'start_paragraph_id': 1, 'start_character': 227, 'end_paragraph_id': 1, 'end_character': 238, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Tony Bennett', 'provenance': [{'wikipedia_id': '9865624', 'title': 'The Best Is Yet to Come', 'start_paragraph_id': 1, 'start_character': 495, 'end_paragraph_id': 1, 'end_character': 507, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9865624', 'title': 'The Best Is Yet to Come', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 507, 'bleu_score': 0.925309847846407, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5660749717246588975}, 'section': 'Section::::Abstract.'}]}]