 Complete the following phrase:  During practice for the 6 Hours of Spa-Francorchamps, Nakajima collided heavily with the back of Oliver Jarviss No. 8 Audi on the Kemmel Straight due to spray-impaired visibility and broke his back. He was not replaced by Kobayashi because the latter was unavailable, and Buemi and Davidson drove the No. 1 TS040 as a two-person entry. Starting in sixth place, they held fifth until Duval and di Grassi passed them; Conway and Sarrazin qualified in seventh. Both cars lacked the Audis and Porsches speed; the No. 2 car finished fifth, and the No. 1 car finished eighth with throttle and electrical problems. Nakajima was cleared by FIA medical delegate Jacques Tropenat to participate in the 