Question: The 1951 Belgian Grand Prix was a Formula One motor race held on 17 June 1951 at Circuit de Spa-Francorchamps ,it's the highest class of single-seat auto racing, that is sanctioned by which organization with the acronym of FIA?
Context: The 1976 Belgian Grand Prix was a Formula One motor race held at Zolder, near Heusden-Zolder in Belgium on 16 May 1976.  The race was the fifth round of the 1976 Formula One season.  It was the 34th Belgian Grand Prix and the third to be held at Circuit Zolder.  Zolder was a replacement venue as Nivelles-Baulers near Brussels was due to host the race in rotation with Zolder but the track surface at Nivelles had deteriorated and Zolder would host the race until the return of Circuit de Spa-Francorchamps in 1983.  The race was held over 70 laps of the 4.3-kilometre circuit for a total race distance of 298 kilometres. The 2017 Belgian Grand Prix (formally known as the 2017 Formula 1 Pirelli Belgian Grand Prix) was a Formula One motor race that was held on 27 August 2017 at the Circuit de Spa-Francorchamps in Stavelot, Belgium.  The race, scheduled to be contested over forty-four laps, was the twelfth round of the 2017 Formula One season, and marked the seventy-third running of the Belgian Grand Prix and the sixtieth time the race was held at Spa-Francorchamps. The 2005 Belgian Grand Prix (formally the LXII Belgian Grand Prix) was a Formula One motor race held on 11 September 2005 at Circuit de Spa-Francorchamps in Spa, Belgium.  It was the sixteenth round of the 2005 Formula One season and the sixty-second Belgian Grand Prix.  The 44-lap race was won by Kimi Räikkönen for the McLaren team, from a second position start.  Fernando Alonso finished second in a Renault, with Jenson Button third for the BAR team. The 2015 Belgian Grand Prix (formally the 2015 Formula 1 Shell Belgian Grand Prix) was a Formula One motor race held on 23 August 2015 at the Circuit de Spa-Francorchamps in Spa, Belgium.  It was the eleventh round of the 2015 Formula One season, and the 71st Belgian Grand Prix. Formula One (also Formula 1 or F1 and officially the FIA Formula One World Championship) is the highest class of single-seat auto racing that is sanctioned by the Fédération Internationale de l'Automobile (FIA).  The FIA Formula One World Championship has been the premier form of racing since the inaugural season in 1950, although other Formula One races were regularly held until 1983.  The "formula", designated in the name, refers to a set of rules, to which all participants' cars must conform.  The F1 season consists of a series of races, known as "Grands Prix" (from French, meaning grand prizes), held worldwide on purpose-built F1 circuits and public roads. The 1951 Belgian Grand Prix was a Formula One motor race held on 17 June 1951 at Circuit de Spa-Francorchamps.  It was race 3 of 8 in the 1951 World Championship of Drivers The 1986 Belgian Grand Prix was a Formula One motor race held at the Circuit de Spa-Francorchamps on May 25, 1986.  It was the fifth round of the 1986 Formula One season.  The race was the 44th Belgian Grand Prix and the 32nd to be held at Spa-Francorchamps.  The race was held over 43 laps of the 7.0-kilometre circuit for a total race distance of 301 kilometres. The 2014 Belgian Grand Prix (formally the 2014 Formula 1 Shell Belgian Grand Prix) was a Formula One motor race held on 24 August 2014 at the Circuit de Spa-Francorchamps in Spa, Belgium.  It was the twelfth round of the 2014 Formula One season, and the 70th Belgian Grand Prix.  The 44-lap race was won by Daniel Ricciardo for the Red Bull Racing team, after starting from fifth position.  Nico Rosberg finished second in a Mercedes, with Valtteri Bottas third for the Williams team. The 2000 Belgian Grand Prix (formally, the LVIII Foster's Belgian Grand Prix) was a Formula One motor race held on 27 August 2000 at the Circuit de Spa-Francorchamps, Stavelot, Belgium.  It was the thirteenth race of the 2000 Formula One season, and the 58th Belgian Grand Prix.  The 44-lap race was won by McLaren driver Mika Häkkinen, who started from the pole position.  Michael Schumacher finished second in a Ferrari, and Williams driver Ralf Schumacher was third. The 2016 Belgian Grand Prix (formally known as the 2016 Formula 1 Belgian Grand Prix) was a Formula One motor race held on 28 August 2016 at the Circuit de Spa-Francorchamps in Spa, Belgium.  It was the thirteenth round of the 2016 Formula One season, and marks the seventy-second running of the Belgian Grand Prix and the fifty-ninth time the race was held at Spa-Francorchamps.
Answer: Fédération Internationale de l'Automobile