 Complete the following phrase:  The 2013 FIA Formula One World Championship was the 64th Formula One World Championship, recognised by the sports governing body, the Fédération Internationale de lAutomobile FIA, as the highest class of competition for open-wheel racing cars. Eleven teams and twenty-three drivers contested the nineteen Grands Prix that made up the calendar for the 2013 season, with the winning driver being crowned the World Drivers Champion and the winning team the World Constructors Champions. The season started in 