CREATE TABLE table_16708 ("Rnd" FLOAT, "Race" TEXT, "Date" TEXT, "Location" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Race Winner" TEXT, "Constructor" TEXT, "Report" TEXT)

What is the race winer of the portuguese grand prix?
SELECT "Race Winner" FROM table_16708 WHERE "Race" = 'Portuguese Grand Prix'
SELECT "Race Winner" FROM "table_16708" WHERE "Race" = 'Portuguese Grand Prix'