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:
| Driver | Constructor | Laps | Time/Retired | Grid |
| --- | --- | --- | --- | --- |
| Alberto Ascari | Ferrari | 77.0 | 3:00:00 | 1.0 |
| Nino Farina | Ferrari | 76.0 | + 1 lap | 2.0 |
| Piero Taruffi | Ferrari | 75.0 | + 2 laps | 3.0 |
| Robert Manzon | Gordini | 74.0 | + 3 laps | 5.0 |
| Maurice Trintignant | Simca - Gordini - Gordini | 72.0 | + 5 laps | 6.0 |
| Peter Collins | HWM - Alta | 70.0 | + 7 laps | 8.0 |
| Jean Behra | Gordini | 70.0 | + 7 laps | 4.0 |
| Philippe Étancelin | Maserati | 70.0 | + 7 laps | 18.0 |
| Lance Macklin | HWM - Alta | 70.0 | + 7 laps | 14.0 |
| Yves Giraud Cabantous | HWM - Alta | 68.0 | + 9 laps | 10.0 |
| Rudi Fischer Peter Hirt | Ferrari | 66.0 | + 11 laps | 17.0 |
| Franco Comotti | Ferrari | 63.0 | + 14 laps | 16.0 |
| Prince Bira | Gordini | 56.0 | Axle | 7.0 |
| Mike Hawthorn | Cooper - Bristol | 51.0 | Ignition | 15.0 |
| Toulo de Graffenried Harry Schell | Maserati | 34.0 | Brakes | 12.0 |
| Peter Whitehead | Alta | 17.0 | Clutch | 13.0 |
| Louis Rosier | Ferrari | 17.0 | Engine | 9.0 |
| Johnny Claes | Simca - Gordini - Gordini | 15.0 | Engine | 20.0 |
| Harry Schell | Maserati | 7.0 | Gearbox | 11.0 |
| Piero Carini | Ferrari | 2.0 | Engine | 19.0 |
Question:
How many grids for peter collins?
Answer:
1.0