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 |
| --- | --- | --- | --- | --- |
| Jo Siffert | Lotus - Ford | 80.0 | 2:01:20.3 | 4.0 |
| Chris Amon | Ferrari | 80.0 | + 4.4 | 3.0 |
| Jacky Ickx | Ferrari | 79.0 | + 1 Lap | 12.0 |
| Denny Hulme | McLaren - Ford | 79.0 | + 1 Lap | 11.0 |
| John Surtees | Honda | 78.0 | + 2 Laps | 9.0 |
| Jackie Stewart | Matra - Ford | 78.0 | + 2 Laps | 7.0 |
| Bruce McLaren | McLaren - Ford | 77.0 | + 3 Laps | 10.0 |
| Piers Courage | BRM | 72.0 | + 8 Laps | 16.0 |
| Jochen Rindt | Brabham - Repco | 55.0 | Fuel Leak | 5.0 |
| Pedro Rodríguez | BRM | 52.0 | Engine | 13.0 |
| Silvio Moser | Brabham - Repco | 52.0 | Not Classified | 19.0 |
| Jackie Oliver | Lotus - Ford | 43.0 | Transmission | 2.0 |
| Robin Widdows | Cooper - BRM | 34.0 | Ignition | 18.0 |
| Graham Hill | Lotus - Ford | 26.0 | Halfshaft | 1.0 |
| Vic Elford | Cooper - BRM | 26.0 | Engine | 7.0 |
| Jean-Pierre Beltoise | Matra | 11.0 | Engine | 14.0 |
| Richard Attwood | BRM | 10.0 | Radiator | 15.0 |
| Dan Gurney | Eagle - Weslake | 8.0 | Fuel Pump | 6.0 |
| Jo Bonnier | McLaren - BRM | 6.0 | Engine | 20.0 |
| Jack Brabham | Brabham - Repco | 0.0 | Engine | 8.0 |
Question:
When the driver richard attwood has a constructor of brm, what is the number of laps?
Answer:
10.0