CREATE TABLE table_name_16 (grid NUMBER, time_retired VARCHAR2, laps VARCHAR2)

When a race had less than 18 laps and time/retired of accident, what was the smallest grid?
SELECT MIN(grid) FROM table_name_16 WHERE time_retired = "accident" AND laps < 18
SELECT MIN("grid") FROM "table_name_16" WHERE "accident" = "time_retired" AND "laps" < 18