CREATE TABLE table_51933 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

what is the grid when the laps is more than 0, the time/retired is engine and the driver is pedro de la rosa?
SELECT "Grid" FROM table_51933 WHERE "Laps" > '0' AND "Time/Retired" = 'engine' AND "Driver" = 'pedro de la rosa'
SELECT "Grid" FROM "table_51933" WHERE "Driver" = 'pedro de la rosa' AND "Laps" > '0' AND "Time/Retired" = 'engine'