 Complete the following phrase:  Manor Marussia also had two new drivers: They employed the former Caterham driver Will Stevens to drive for his first full season in the sport, while another former Caterham test driver, Roberto Merhi, was signed to a short-term deal while he also drove in the Formula Renault 3.5 Series. Max Chilton relinquished his seat, joining the Indy Lights championship, while Jules Bianchi was in a coma at the start of the season and ultimately died from injuries sustained at the 2014 Japanese Grand Prix. Alexander Rossi was later drafted in by Manor Marussia to make his Formula One début at the Singapore Grand Prix, replacing Merhi. The Spaniard returned to the team for the 