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

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'