CREATE TABLE table_33983 ("Tournament" TEXT, "2006" TEXT, "2007" TEXT, "2008-12" TEXT, "2013" TEXT)

Which 2013 has a 2006 of grand slam tournaments?
SELECT "2013" FROM table_33983 WHERE "2006" = 'grand slam tournaments'
SELECT "2013" FROM "table_33983" WHERE "2006" = 'grand slam tournaments'