user: Question: what is the grid when the time/retired is 1:46:42.3?
Columns: ['Driver', 'Constructor', 'Laps', 'Time/Retired', 'Grid']
Types: ['text', 'text', 'real', 'text', 'real']
Sample row: ['Jackie Stewart', 'Tyrrell - Ford', 55.0, '1:46:42.3', 1.0]
SQL:

assistant: SELECT "Grid" FROM "Table" WHERE "Time/Retired" = '1:46:42.3';