user: Question: Name the region 1 where region 4 for April 2, 2009
Columns: ['DVD Name', 'Ep #', 'Region 1', 'Region 2 (Scandinavia)', 'Region 2 (UK)', 'Region 4', 'Special features']
Types: ['text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['The Fourth Season', 34.0, 'April 15, 2008', 'March 11, 2009', 'March 22, 2010', 'April 2, 2009', 'None']
SQL:

assistant: SELECT "Region 1" FROM "Table" WHERE "Region 4" = 'April 2, 2009';