CREATE TABLE table_55431 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

what is the grid when the driver is louis rosier and the laps is more than 78?
SELECT MIN("Grid") FROM table_55431 WHERE "Driver" = 'louis rosier' AND "Laps" > '78'
SELECT MIN("Grid") FROM "table_55431" WHERE "Driver" = 'louis rosier' AND "Laps" > '78'