Question: who sang the song ode to billy joe
[{'answer': 'Bobbie Gentry', 'provenance': [{'wikipedia_id': '522070', 'title': 'Ode to Billie Joe', 'start_paragraph_id': 1, 'start_character': 54, 'end_paragraph_id': 1, 'end_character': 67, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]