Question: who sang don't think twice it's alright
[{'answer': 'Bob Dylan', 'provenance': [{'wikipedia_id': '3851409', 'title': "Don't Think Twice, It's All Right", 'start_paragraph_id': 1, 'start_character': 57, 'end_paragraph_id': 1, 'end_character': 66, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]