user: Question: Name the most epiosdes when region 4 is March 13, 2008
Columns: ['Volume', 'Discs', 'Episodes', 'Region 1', 'Region 2', 'Region 4']
Types: ['real', 'real', 'real', 'text', 'text', 'text']
Sample row: [1.0, 1.0, 4.0, 'January 31, 2006', 'February 19, 2007', 'March 15, 2007']
SQL:

assistant: SELECT MAX("Episodes") FROM "Table" WHERE "Region 4" = 'March 13, 2008';