Question: what is the acronym of iou in finance
[{'answer': 'I owe you', 'provenance': [{'wikipedia_id': '19613312', 'title': 'IOU', 'start_paragraph_id': 1, 'start_character': 37, 'end_paragraph_id': 1, 'end_character': 46, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19613312', 'title': 'IOU', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 551, 'bleu_score': 0.978606533029418, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1435418793036536811}, 'section': 'Section::::Abstract.'}]}]