CREATE TABLE table_47744 ("Series Sorted" CLOB, "Title" CLOB, "Doctor" CLOB, "Featuring" CLOB, "Released" CLOB)

What was the date of release for the episode sorted value of 6Y/AA?
SELECT "Released" FROM table_47744 WHERE "Series Sorted" = '6y/aa'
SELECT "Released" FROM "table_47744" WHERE "Series Sorted" = '6y/aa'