user: Question: What discs has a region 1 release date of January 22, 2008?
Columns: ['Volume', 'Discs', 'Episodes', 'Region 1 release', 'Region 2 release', 'Region 4 release']
Types: ['text', 'real', 'real', 'text', 'text', 'text']
Sample row: ['1', 1.0, 5.0, 'October 30, 2007', 'Not released', 'June 1, 2010']
SQL:

assistant: SELECT "Discs" FROM "Table" WHERE "Region 1 release" = 'January 22, 2008';