Question: when were backflips made illegal in figure skating
[{'answer': '1976', 'provenance': [{'wikipedia_id': '362948', 'title': 'Surya Bonaly', 'start_paragraph_id': 31, 'start_character': 386, 'end_paragraph_id': 31, 'end_character': 390, 'bleu_score': 1.0, 'section': 'Section::::Career.:1997–1998 season: Third Olympics.\n'}]}, {'provenance': [{'wikipedia_id': '362948', 'title': 'Surya Bonaly', 'start_paragraph_id': 31, 'start_character': 0, 'end_paragraph_id': 31, 'end_character': 595, 'bleu_score': 0.9796927878356411, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16903291234043511160}, 'section': 'Section::::Career.:1997–1998 season: Third Olympics.\n'}]}]