CREATE TABLE table_47043 ("Tournament" TEXT, "1990" TEXT, "1991" TEXT, "1992" TEXT, "1993" TEXT, "1994" TEXT, "1995" TEXT, "1996" TEXT, "1997" TEXT, "1998" TEXT, "1999" TEXT, "2000" TEXT, "2001" TEXT, "Career SR" TEXT, "Career Win-Loss" TEXT)

What is the 1991 finish for the 1993 Grand Slams?
SELECT "1991" FROM table_47043 WHERE "1993" = 'grand slams'
SELECT "1991" FROM "table_47043" WHERE "1993" = 'grand slams'