Question: when did the polymer £5 come out
[{'answer': '13 September 2016', 'provenance': [{'wikipedia_id': '50344748', 'title': 'Bank of England £5 note', 'start_paragraph_id': 17, 'start_character': 27, 'end_paragraph_id': 17, 'end_character': 44, 'bleu_score': 1.0, 'section': 'Section::::History.:Moving to polymer.\n'}]}]