Question: curvature of a circle of radius r is given by
[{'answer': 'the reciprocal of the radius', 'provenance': [{'wikipedia_id': '60770', 'title': 'Curvature', 'start_paragraph_id': 8, 'start_character': 239, 'end_paragraph_id': 8, 'end_character': 267, 'bleu_score': 1.0, 'section': 'Section::::Curvature of plane curves.\n'}]}, {'provenance': [{'wikipedia_id': '60770', 'title': 'Curvature', 'start_paragraph_id': 8, 'start_character': 0, 'end_paragraph_id': 8, 'end_character': 267, 'bleu_score': 0.8250579990735111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3854485727851954522}, 'section': 'Section::::Curvature of plane curves.\n'}]}]