user: Question: what is the time/retired when the driver is Toulo de Graffenried?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Alberto Ascari', 'Ferrari', 90.0, '2:50:00', 1.0]
SQL:

assistant: SELECT "Time/Retired" FROM "Table" WHERE "Driver" = 'Toulo de Graffenried';