user: Question: What time/retired for grid 18?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Graham Hill', 'BRM', 110.0, '2:16:38.0', 4.0]
SQL:

assistant: SELECT "Time/Retired" FROM "Table" WHERE "Grid" = 18.0;