Question: when did they stop using 1000 dollar bills
[{'answer': '1969', 'provenance': [{'wikipedia_id': '477372', 'title': 'Large denominations of United States currency', 'start_paragraph_id': 1, 'start_character': 116, 'end_paragraph_id': 1, 'end_character': 120, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '477372', 'title': 'Large denominations of United States currency', 'start_paragraph_id': 9, 'start_character': 0, 'end_paragraph_id': 9, 'end_character': 392, 'bleu_score': 0.8427342196707961, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 921160368057651178}, 'section': 'Section::::Passive retirement.\n'}]}]