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 |
| --- | --- | --- | --- | --- | --- |
| Targa Florio | Madonie | 15 April | Ugo Sivocci | Alfa Romeo | Report |
| Cremona Circuit | Cremona | 6 May | Antonio Ascari | Alfa Romeo | Report |
| Mugello Circuit | Mugello | 10 June | Gastone Brilli-Peri | Steyr | Report |
| Savio Circuit | Ravenna | 17 June | Enzo Ferrari | Alfa Romeo | Report |
| San Sebastián Grand Prix | Lasarte | 25 July | Albert Guyot | Rolland-Pilain | Report |
| Coppa Montenero | Montenero | 26 August | Mario Razzauti | Ansaldo | Report |
| Spanish Grand Prix | Sitges-Terramar | 28 October | Albert Divo | Sunbeam | Report |
| Garda Circuit | Salò | 25 November | Guido Meregalli | Diatto | Report |
Question:
What Date has a Winning driver of ugo sivocci?
Answer:
15 April