 Complete the following phrase:  The 2012 Spa-Francorchamps GP2 Series round and the 2012 Spa-Francorchamps GP3 Series round was a group of motor races held at the Circuit de Spa-Francorchamps near Spa in Belgium for the GP2 and GP3 Series championships. The races, held on 1 and 2 September, were in support of the 