user: Question: What is the default desktop environment when the edition is KDE and the compatible repository is Ubuntu 13.04?
Columns: ['Version', 'Codename', 'Edition', 'Code Base', 'Compatible repository', 'Default desktop environment', 'Release date']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Old version, no longer supported: 1.0', 'Ada', 'Main', 'Kubuntu 6.06', 'Kubuntu 6.06', 'KDE', '27 August 2006']
SQL:

assistant: SELECT "Default desktop environment" FROM "Table" WHERE "Edition" = 'KDE' AND "Compatible repository" = 'Ubuntu 13.04';