CREATE TABLE table_53135 ("Driver" TEXT, "Constructor" TEXT, "Laps" TEXT, "Time/Retired" TEXT, "Grid" TEXT)

Which grid is constructed by Maserati and driven by Oscar Alfredo G lvez?
SELECT "Grid" FROM table_53135 WHERE "Constructor" = 'maserati' AND "Driver" = 'oscar alfredo gálvez'
SELECT "Grid" FROM "table_53135" WHERE "Constructor" = 'maserati' AND "Driver" = 'oscar alfredo gálvez'