CREATE TABLE table_31906 ("Driver" TEXT, "Constructor" TEXT, "Laps" FLOAT, "Time/Retired" TEXT, "Grid" FLOAT)

In less than 58 laps, what is the highest grid for Alexander Wurz?
SELECT MAX("Grid") FROM table_31906 WHERE "Driver" = 'alexander wurz' AND "Laps" < '58'
SELECT MAX("Grid") FROM "table_31906" WHERE "Driver" = 'alexander wurz' AND "Laps" < '58'