human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Circuit, Date, Pole position, Fastest Lap, Winning driver, Winning team, Winning manufacturer
###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?
gpt
SELECT Winning team FROM table WHERE Winning manufacturer = audi AND Winning driver = timo scheider AND Date = 31 august