Question: when did they start putting presidents on money
[{'answer': '1869', 'provenance': [{'wikipedia_id': '3948441', 'title': 'List of Presidents of the United States on currency', 'start_paragraph_id': 50, 'start_character': 25, 'end_paragraph_id': 50, 'end_character': 29, 'bleu_score': 1.0, 'section': 'Section::::United States.:George Washington.:Banknotes.\n'}]}]