user: Question: What is the region 2 (UK) date associated with a region 4 (Aus) date of July 31, 2008?
Columns: ['DVD Name', 'Ep #', 'Region 1 (US)', 'Region 1 (CAN)', 'Region 2 (UK)', 'Region 2 (Germany)', 'Region 4 (Australia)']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['The Complete First Season', '25 (3 discs)', 'November 18, 2003', 'August 11, 2009', 'January 29, 2007', 'November 26, 2004', 'January 11, 2007']
SQL:

assistant: SELECT "Region 2 (UK)" FROM "Table" WHERE "Region 4 (Australia)" = 'July 31, 2008';