user: Question: torque@rpm of N·m (lb·ft)@4050 has what code?
Columns: ['Code', 'Years', 'Displacement (bore x stroke)/Type', 'Power@rpm', 'torque@rpm', 'Compression (:1)']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1.5 Duratec Ti-VCT', '2013-', 'cc (L; cu in) (mm (in)?xmm (in)?) I4', 'PS (kW; hp)@6300', 'N·m (lb·ft)@4300', '11.0:1']
SQL:

assistant: SELECT "Code" FROM "Table" WHERE "torque@rpm" = 'N·m (lb·ft)@4050';