CREATE TABLE table_36338 ("Volume" CLOB, "Discs" FLOAT, "Episodes" FLOAT, "Region 1 release" CLOB, "Region 2 release" CLOB, "Region 4 release" CLOB)

What is the region 4 release that has july 20, 2009 as the region 2?
SELECT "Region 4 release" FROM table_36338 WHERE "Region 2 release" = 'july 20, 2009'
SELECT "Region 4 release" FROM "table_36338" WHERE "Region 2 release" = 'july 20, 2009'