Question: who wrote safe and sound by taylor swift
[{'answer': 'Taylor Swift', 'provenance': [{'wikipedia_id': '34164162', 'title': 'Safe & Sound (Taylor Swift song)', 'start_paragraph_id': 0, 'start_character': 18, 'end_paragraph_id': 0, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Joy Williams', 'provenance': [{'wikipedia_id': '34164162', 'title': 'Safe & Sound (Taylor Swift song)', 'start_paragraph_id': 4, 'start_character': 44, 'end_paragraph_id': 4, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'answer': 'John Paul White', 'provenance': [{'wikipedia_id': '34164162', 'title': 'Safe & Sound (Taylor Swift song)', 'start_paragraph_id': 4, 'start_character': 58, 'end_paragraph_id': 4, 'end_character': 73, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'answer': 'T - Bone Burnett', 'provenance': [{'wikipedia_id': '34164162', 'title': 'Safe & Sound (Taylor Swift song)', 'start_paragraph_id': 4, 'start_character': 79, 'end_paragraph_id': 4, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}]