user: Question: What is the length in feet of the Jiangzhou Arch?
Columns: ['Rank', 'Name', 'Location', 'Length ( m )', 'Length ( ft )']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Xian Ren Qiao (Fairy Bridge)', 'Guangxi , China', '121 (+/-5)', '400 (+/-15)']
SQL:

assistant: SELECT "Length ( ft )" FROM "Table" WHERE "Name" = 'Jiangzhou Arch';