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 | Category | Location | Report |
| --- | --- | --- | --- | --- | --- |
| 1958 | Stirling Moss | Vanwall | Formula One | Ain-Diab | Report |
| 1957 | Jean Behra | Maserati | Formula One | Ain-Diab | Report |
| 1956 | Maurice Trintignant | Ferrari | Sports cars | Agadir | Report |
| 1955 | Mike Sparken | Ferrari | Sports cars | Agadir | Report |
| 1954 | Giuseppe Farina | Ferrari | Sports cars | Agadir | Report |
| 1953 - 1935 | Not held | Not held | Not held | Not held | Not held |
| 1934 | Louis Chiron | Alfa Romeo | s Touring car | Anfa | Report |
| 1933 | Not held | Not held | Not held | Not held | Not held |
| 1932 | Marcel Lehoux | Bugatti | s Touring car | Anfa | Report |
| 1931 | Stanisław Czaykowski | Bugatti | s Touring car | Anfa | Report |
| 1930 | Charles Bénitah | Amilcar | s Touring car | Anfa | Report |
| 1929 | Not held | Not held | Not held | Not held | Not held |
| 1928 | E. Meyer | Bugatti | s Touring car | Casablanca | Report |
| 1927 | G. Roll | Georges Irat | s Touring car | Casablanca | Report |
| 1926 | R. Meyerl | Bugatti | s Touring car | Casablanca | Report |
| 1925 | Comte de Vaugelas | Delage | s Touring car | Casablanca | Report |
Question:
What company constructed the vehicle when the driver shows as not held?
Answer:
Not held, Not held, Not held