Question: when did bobby darin sing mack the knife
[{'answer': '1959', 'provenance': [{'wikipedia_id': '285475', 'title': 'Mack the Knife', 'start_paragraph_id': 1, 'start_character': 429, 'end_paragraph_id': 1, 'end_character': 433, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '285475', 'title': 'Mack the Knife', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 433, 'bleu_score': 0.9321992460304711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17924398811884763636}, 'section': 'Section::::Abstract.'}]}]