Question: when did they start production on the post
[{'answer': 'February 2017', 'provenance': [{'wikipedia_id': '53404298', 'title': 'The Post (film)', 'start_paragraph_id': 42, 'start_character': 109, 'end_paragraph_id': 42, 'end_character': 122, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}, {'provenance': [{'wikipedia_id': '53404298', 'title': 'The Post (film)', 'start_paragraph_id': 42, 'start_character': 0, 'end_paragraph_id': 42, 'end_character': 611, 'bleu_score': 0.9559054761834711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 10815538465262760636}, 'section': 'Section::::Production.\n'}]}]