user: Question: What is the winning team of the race on 31 August with Audi as the winning manufacturer and Timo Scheider as the winning driver?
Columns: ['Circuit', 'Date', 'Pole position', 'Fastest Lap', 'Winning driver', 'Winning team', 'Winning manufacturer']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Präsentation Düsseldorf', '6 April', 'no race', 'no race', 'no race', 'no race', 'no race']
SQL:

assistant: SELECT "Winning team" FROM "Table" WHERE "Winning manufacturer" = 'Audi' AND "Winning driver" = 'Timo Scheider' AND "Date" = '31 August';