Question: who sang the original version of mr bojangles
[{'answer': 'Jerry Jeff Walker', 'provenance': [{'wikipedia_id': '6397679', 'title': 'Mr. Bojangles (song)', 'start_paragraph_id': 1, 'start_character': 91, 'end_paragraph_id': 1, 'end_character': 108, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6397679', 'title': 'Mr. Bojangles (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 544, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3511188747391550085}, 'section': 'Section::::Abstract.'}]}]