Question: who sang the song it's such a pretty world today
[{'answer': 'Wynn Stewart', 'provenance': [{'wikipedia_id': '18550302', 'title': "It's Such a Pretty World Today", 'start_paragraph_id': 2, 'start_character': 57, 'end_paragraph_id': 2, 'end_character': 69, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18550302', 'title': "It's Such a Pretty World Today", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 424, 'bleu_score': 0.9313525659032991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6077575488463549234}, 'section': 'Section::::Abstract.'}]}]