What is the region 2 (UK) date associated with a region 4 (Aus) date of July 31, 2008?
create table table_240936_2 (region_2__uk_ varchar, region_4__australia_ varchar, PRIMARY KEY (region_2__uk_))
select region_2__uk_ from table_240936_2 where region_4__australia_ = "july 31, 2008"