Table schema:
CREATE TABLE table_name_13 (winning_driver VARCHAR, pole_position VARCHAR, fastest_lap VARCHAR, constructor VARCHAR)

Question: Who was the winning driver when pole position was jenson button, the fastest lap was michael schumacher and the car was ferrari?
SQL: SELECT winning_driver FROM table_name_13 WHERE fastest_lap = "michael schumacher" AND constructor = "ferrari" AND pole_position = "jenson button"