Question: when was paper money first used in the us
[{'answer': 'During the American Revolution', 'provenance': [{'wikipedia_id': '3193951', 'title': 'Early American currency', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 30, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '3193951', 'title': 'Early American currency', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 522, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5901399254518328827}, 'section': 'Section::::Abstract.'}]}]