Question: meaning of back to december by taylor swift
[{'answer': 'an apology', 'provenance': [{'wikipedia_id': '28923756', 'title': 'Back to December', 'start_paragraph_id': 5, 'start_character': 42, 'end_paragraph_id': 5, 'end_character': 52, 'bleu_score': 1.0, 'section': 'Section::::Background and release.\n'}]}, {'provenance': [{'wikipedia_id': '28923756', 'title': 'Back to December', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 1034, 'bleu_score': 0.9759444845292861, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6404118992587654444}, 'section': 'Section::::Background and release.\n'}]}]