user: Question: What is Nigel Mansell's time/retired?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Nelson Piquet', 'Williams - Honda', 51.0, '1:17:42.889', 6.0]
SQL:

assistant: SELECT "Time/Retired" FROM "Table" WHERE "Driver" = 'Nigel Mansell';