buy diamond engagement ring 1 carat round cut
[{'entity': 'MATERIAL', 'value': 'diamond', 'span': [4, 11]}, {'entity': 'CORE_PRODUCT_TYPE', 'value': 'engagement ring', 'span': [12, 27]}, {'entity': 'UoM', 'value': '1 carat', 'span': [28, 35]}, {'entity': 'SHAPE', 'value': 'round cut', 'span': [36, 45]}]
buy diamond engagement ring 1 carat round cut