CREATE TABLE table_55481 ("Tournament" CLOB, "2007" CLOB, "2008" CLOB, "2009" CLOB, "2010" CLOB, "2011" CLOB, "2012" CLOB)

What is the categorization in 2010 when it was A in 2008 and 20011 while being QF in 2012?
SELECT "2010" FROM table_55481 WHERE "2008" = 'a' AND "2011" = 'a' AND "2012" = 'qf'
SELECT "2010" FROM "table_55481" WHERE "2008" = 'a' AND "2011" = 'a' AND "2012" = 'qf'