Question: who did taylor swift write back to december about
[{'answer': 'Taylor Lautner', 'provenance': [{'wikipedia_id': '28923756', 'title': 'Back to December', 'start_paragraph_id': 1, 'start_character': 397, 'end_paragraph_id': 1, 'end_character': 411, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28923756', 'title': 'Back to December', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 630, 'bleu_score': 0.9579655027162681, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2928030970577771044}, 'section': 'Section::::Abstract.'}]}]