user: Question: Which grid is the highest and has a time/retired of +0.3?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Juan Manuel Fangio', 'Mercedes', 100.0, '2:54:23.8', 1.0]
SQL:

assistant: SELECT MAX("Grid") FROM "Table" WHERE "Time/Retired" = '+0.3';