CREATE TABLE table_221 ("Race Name" TEXT, "Circuit" TEXT, "Date" TEXT, "Winning driver" TEXT, "Constructor" TEXT, "Report" TEXT)

Which driver won at the Sachsenring circuit?
SELECT "Winning driver" FROM table_221 WHERE "Circuit" = 'Sachsenring'
SELECT "Winning driver" FROM "table_221" WHERE "Circuit" = 'Sachsenring'