Question: when was the book fifty shades of grey written
[{'answer': '2011', 'provenance': [{'wikipedia_id': '35166850', 'title': 'Fifty Shades of Grey', 'start_paragraph_id': 1, 'start_character': 26, 'end_paragraph_id': 1, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '35166850', 'title': 'Fifty Shades of Grey', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 599, 'bleu_score': 0.7099632202267361, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3302925250819629398}, 'section': 'Section::::Abstract.'}]}]