CREATE TABLE table_56786 ("Driver" TEXT, "Constructor" TEXT, "Laps" TEXT, "Time/Retired" TEXT, "Grid" TEXT)

What is the grid value which has Time/Retired value of accident?
SELECT "Grid" FROM table_56786 WHERE "Time/Retired" = 'accident'
SELECT "Grid" FROM "table_56786" WHERE "Time/Retired" = 'accident'