Question: what is the interest rate on a bond known as
[{'answer': 'coupon rate', 'provenance': [{'wikipedia_id': '561477', 'title': 'Fixed rate bond', 'start_paragraph_id': 1, 'start_character': 255, 'end_paragraph_id': 1, 'end_character': 266, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '561477', 'title': 'Fixed rate bond', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 544, 'bleu_score': 0.588009164025879, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15074176244467621543}, 'section': 'Section::::Abstract.'}]}]