Table: dvd_seasons
Columns: dvd_name
ep
region_1
region_2_scandinavia
region_2_uk
region_4
special_features

Question: Name the region 1 where region 4 for april 2, 2009
SQL: SELECT "region_1" FROM dvd_seasons WHERE "region_4" = 'April 2, 2009'

Question: Name the region 1 for episode number 13
SQL: SELECT "region_1" FROM dvd_seasons WHERE "ep" = 13