Question: who sang the times they are a changin
[{'answer': 'Bob Dylan', 'provenance': [{'wikipedia_id': '4679551', 'title': "The Times They Are a-Changin' (song)", 'start_paragraph_id': 1, 'start_character': 53, 'end_paragraph_id': 1, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4679551', 'title': "The Times They Are a-Changin' (song)", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 352, 'bleu_score': 0.8819694855922411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16666322025316931960}, 'section': 'Section::::Abstract.'}]}]