 Complete the following phrase:  In 1997, BMW announced that it had formed a partnership with Williams Grand Prix Engineering in order to provide V10 engines in 2000. The initial development of this partnership was BMWs sports car effort. Chassis built by Williams powered by a BMW M70 V12 engines were entered by long-time partner team Schnitzer Motorsport. The rather unsuccessful 1998 model was improved, and the efforts culminated in BMWs victory at the 