CREATE TABLE table_76318 ("Tournament" TEXT, "1990" TEXT, "1991" TEXT, "1992" TEXT, "1993" TEXT, "1994" TEXT, "1995" TEXT, "1996" TEXT, "1997" TEXT, "Career SR" TEXT, "Career Win-Loss" TEXT)

What is 1994, when 1991 is 'QF', and when Tournament is 'Australian Open'?
SELECT "1994" FROM table_76318 WHERE "1991" = 'qf' AND "Tournament" = 'australian open'
SELECT "1994" FROM "table_76318" WHERE "1991" = 'qf' AND "Tournament" = 'australian open'