user: Question: What is the date that Fabrizio Giovanardi Christian Abt won?
Columns: ['Round', 'Race', 'Circuit', 'Date', 'Event', 'Winning driver', 'Winning team']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Int. ADAC-Sparkassenpreises für Automobile', 'Sachsenring', '9 May', 'Sprint Race', 'Christian Abt Christian Abt', 'Abt Sportsline Abt Sportsline']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Winning driver" = 'Fabrizio Giovanardi Christian Abt';