 Complete the following phrase:  The Scuderia Toro Rosso STR13 is a Formula One racing car designed and constructed by Scuderia Toro Rosso to compete in the 2018 FIA Formula One World Championship. The car was driven by Pierre Gasly and Brendon Hartley, both of whom were retained by the team after contesting selected events in 2017. The STR13 made its competitive début at the 