CREATE TABLE table_28094 ("Round" FLOAT, "Circuit" TEXT, "Location" TEXT, "Date" TEXT, "Pole position" TEXT, "Fastest lap" TEXT, "Winning driver" TEXT, "Winning team" TEXT)

Who won the April 11 race?
SELECT "Winning driver" FROM table_28094 WHERE "Date" = 'April 11'
SELECT "Winning driver" FROM "table_28094" WHERE "Date" = 'April 11'