Question: who sang it's a mean old world
[{'answer': 'T - Bone Walker', 'provenance': [{'wikipedia_id': '28375682', 'title': 'Mean Old World', 'start_paragraph_id': 8, 'start_character': 455, 'end_paragraph_id': 8, 'end_character': 470, 'bleu_score': 1.0, 'section': 'Section::::Little Walter version.\n'}]}, {'provenance': [{'wikipedia_id': '28375682', 'title': 'Mean Old World', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 0, 'bleu_score': 1.0, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18101439903478808616}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28375682', 'title': 'Mean Old World', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 330, 'bleu_score': 0.9657992495762461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18101439903478808616}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28375682', 'title': 'Mean Old World', 'section': 'Section::::Little Walter version.\n', 'start_paragraph_id': 8, 'end_paragraph_id': 8, 'meta': {'evidence_span': ['The song was a hit, reaching number six on the Billboard R&B chart, where it remained for six weeks in 1953. Backing Little Walter are the Aces, with guitarists Louis and Dave Myers and drummer Fred Below. T-Bone Walker\'s Capitol version was released before "Billboard" magazine or a similar service began tracking such releases, so it is difficult to gauge which version was more popular.', "The song was a hit, reaching number six on the Billboard R&B chart, where it remained for six weeks in 1953. Backing Little Walter are the Aces, with guitarists Louis and Dave Myers and drummer Fred Below. T-Bone Walker's Capitol version was released before", 'In October 1952, Little Walter recorded his version of "Mean Old World" for Checker Records, a subsidiary of Chess Records. It was recast as a Chicago blues, with Walter\'s amplified harmonica prominently featured and several new lyrics substituted. The song was a hit, reaching number six on the Billboard R&B chart, where it remained for six weeks in 1953. Backing Little Walter are the Aces, with guitarists Louis and Dave Myers and drummer Fred Below. T-Bone Walker\'s Capitol version was released before "Billboard" magazine or a similar service began tracking such releases, so it is difficult to gauge which version was more popular. Little Walter received the sole credit for his recording.']}}]}]