user: Question: Tell me the date for Rudolf Caracciola for Avusrennen
Columns: ['Name', 'Circuit', 'Date', 'Winning driver', 'Winning constructor', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Tunis Grand Prix', 'Carthage', '29 March', 'Achille Varzi', 'Bugatti', 'Report']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Winning driver" = 'Rudolf Caracciola' AND "Name" = 'Avusrennen';