ergonomic office chair lumbar support mesh back
[{'entity': 'ATTRIBUTE', 'value': 'ergonomic', 'span': [0, 9]}, {'entity': 'CORE_PRODUCT_TYPE', 'value': 'office chair', 'span': [10, 22]}, {'entity': 'ATTRIBUTE', 'value': 'lumbar support', 'span': [23, 37]}, {'entity': 'MATERIAL', 'value': 'mesh back', 'span': [38, 47]}]
ergonomic office chair lumbar support mesh back