Question: when did the song mr. sandman come out
[{'answer': '1954', 'provenance': [{'wikipedia_id': '1930042', 'title': 'Mr. Sandman', 'start_paragraph_id': 1, 'start_character': 119, 'end_paragraph_id': 1, 'end_character': 123, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1930042', 'title': 'Mr. Sandman', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 805, 'bleu_score': 0.985764216565234, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 699832415663969883}, 'section': 'Section::::Abstract.'}]}]