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:
| Name | Circuit | Date | Winning driver | Winning constructor | Report |
| --- | --- | --- | --- | --- | --- |
| Nice Grand Prix | Nice | 22 April | Luigi Villoresi | Maserati | Report |
| Marseille Grand Prix | Prado | 12 May | Raymond Sommer | Maserati | Report |
| Forez Grand Prix | St Just-Andrezieux | 19 May | Raymond Sommer | Maserati | Report |
| Paris Cup | Bois de Boulogne | 30 May | Jean-Pierre Wimille | Alfa Romeo | Report |
| Grand Prix des Frontières | Chimay | 9 June | Leslie Brooke | ERA | Report |
| Gransden Lodge | Gransden Lodge Airfield | 15 June | George Abecassis | Bugatti | Report |
| Roussillon Grand Prix | Perpignan | 30 June | Jean-Pierre Wimille | Alfa Romeo | Report |
| Burgundy Grand Prix | Dijon | 7 July | Jean-Pierre Wimille | Alfa Romeo | Report |
| Albi Grand Prix | Albi | 14 July | Tazio Nuvolari | Maserati | Report |
| Nantes Grand Prix | Nantes | 28 July | "Raph" | Maserati | Report |
| Ulster Trophy | Ballyclare | 10 August | Prince Bira | ERA | Report |
| Circuit des Trois Villes | Lille | 25 August | Raymond Sommer | Maserati | Report |
| Circuit des Trois Villes | Lille | 25 August | Henri Louveau | Maserati | Report |
| Milan Grand Prix | Sempione Park | 29 September | Carlo Felice Trossi | Alfa Romeo | Report |
| Coupe du Salon | Bois de Boulogne | 6 October | Raymond Sommer | Maserati | Report |
| Gávea Circuit Race | Gávea | 6 October | Chico Landi | Alfa Romeo | Report |
| Penya Rhin Grand Prix | Pedralbes | 27 October | Giorgio Pelassa | Maserati | Report |
| Boa Vista Grand Prix | Rio de Janeiro | 15 December | Chico Landi | Alfa Romeo | Report |
Question:
Which Constructor won the Roussillon Grand Prix?
Answer:
Alfa Romeo