CREATE TABLE table_14227 ("School" CLOB, "Location" CLOB, "Mascot" CLOB, "Enrollment 12-13" FLOAT, "IHSAA Class" CLOB, "IHSAA Class Football" CLOB, "County" CLOB, "Year Joined" FLOAT, "Previous Conference" CLOB)

Which year did park tudor school join IHSAA class AA?
SELECT "Year Joined" FROM table_14227 WHERE "IHSAA Class Football" = 'aa' AND "School" = 'park tudor'
SELECT "Year Joined" FROM "table_14227" WHERE "IHSAA Class Football" = 'aa' AND "School" = 'park tudor'