user: Question: If artist 1 is Wolfgang Gartner, what is the release date?
Columns: ['Song 1 title', 'Artist 1', 'Song 2 title', 'Artist 2', 'Mix artist', 'Guitar part?', 'Mix pack', 'Release date']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['"All of Me"', '50 Cent featuring Mary J. Blige', '" Radio Ga Ga "', 'Queen', 'FreeStyleGames', 'No', 'Extended Mix Pack 01', 'Oct. 27, 2009']
SQL:

assistant: SELECT "Release date" FROM "Table" WHERE "Artist 1" = 'Wolfgang Gartner';