CREATE TABLE table_63842 ("Region" CLOB, "Date" CLOB, "Label" CLOB, "Format" CLOB, "Catalog" CLOB)

What is the Format of the September 22, 2008 release with Catalog number RTRADCD491?
SELECT "Format" FROM table_63842 WHERE "Catalog" = 'rtradcd491' AND "Date" = 'september 22, 2008'
SELECT "Format" FROM "table_63842" WHERE "Catalog" = 'rtradcd491' AND "Date" = 'september 22, 2008'