Question: when did filming start for fifty shades of grey
[{'answer': 'December 1 , 2013', 'provenance': [{'wikipedia_id': '40218034', 'title': 'Fifty Shades of Grey (film)', 'start_paragraph_id': 40, 'start_character': 262, 'end_paragraph_id': 40, 'end_character': 279, 'bleu_score': 1.0, 'section': 'Section::::Production.:Filming.\n'}]}, {'provenance': [{'wikipedia_id': '40218034', 'title': 'Fifty Shades of Grey (film)', 'start_paragraph_id': 40, 'start_character': 196, 'end_paragraph_id': 40, 'end_character': 388, 'bleu_score': 0.934334813046729, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13294014300077456370}, 'section': 'Section::::Production.:Filming.\n'}]}]