Question: when did they start putting watermarks on 100 dollar bills
[{'answer': 'March 25 , 1996'}, {'provenance': [{'wikipedia_id': '477355', 'title': 'United States one hundred-dollar bill', 'start_paragraph_id': 29, 'start_character': 0, 'end_paragraph_id': 29, 'end_character': 928, 'bleu_score': 0.986797956037998, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2004352863496634974}, 'section': 'Section::::Small size note history.\n'}]}]