CREATE TABLE table_name_15 (winning_team VARCHAR(255), date VARCHAR(255), winning_manufacturer VARCHAR(255), winning_driver VARCHAR(255))
What is the winning team of the race on 31 August with Audi as the winning manufacturer and Timo Scheider as the winning driver?
    
SQL: SELECT winning_team FROM table_name_15 WHERE winning_manufacturer = "audi" AND winning_driver = "timo scheider" AND date = "31 august"