Question: when was the last time the dollar bill was changed
[{'answer': '1963', 'provenance': [{'wikipedia_id': '509259', 'title': 'United States one-dollar bill', 'start_paragraph_id': 1, 'start_character': 610, 'end_paragraph_id': 1, 'end_character': 614, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]