Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Driver | Constructor | Location | Report |
| --- | --- | --- | --- | --- |
| 1940.0 | Giuseppe Farina | Alfa Romeo | Mellaha | Report |
| 1939.0 | Hermann Lang | Mercedes-Benz | Mellaha | Report |
| 1938.0 | Hermann Lang | Mercedes-Benz | Mellaha | Report |
| 1937.0 | Hermann Lang | Mercedes-Benz | Mellaha | Report |
| 1936.0 | Achille Varzi | Auto Union | Mellaha | Report |
| 1935.0 | Rudolf Caracciola | Mercedes-Benz | Mellaha | Report |
| 1934.0 | Achille Varzi | Alfa Romeo | Mellaha | Report |
| 1933.0 | Achille Varzi | Bugatti | Mellaha | Report |
| 1930.0 | Baconin Borzacchini | Maserati | Tripoli | Report |
| 1929.0 | Gastone Brilli-Peri | Talbot | Tripoli | Report |
| 1928.0 | Tazio Nuvolari | Bugatti | Tripoli | Report |
| 1927.0 | Emilio Materassi | Bugatti | Tripoli | Report |
| 1926.0 | François Eysermann | Bugatti | Tripoli | Report |
| 1925.0 | Renato Balestrero | OM | Tripoli | Report |
Question:
What was the constructor of the car that Achille Varzi drove before 1937?
Answer:
Auto Union, Alfa Romeo, Bugatti