Question: when did the 20 dollar bill come out
[{'answer': '1861', 'provenance': [{'wikipedia_id': '477336', 'title': 'United States twenty-dollar bill', 'start_paragraph_id': 4, 'start_character': 12, 'end_paragraph_id': 4, 'end_character': 16, 'bleu_score': 1.0, 'section': 'Section::::Pre–Federal Reserve history.\n'}]}]