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?
Sentence (from "Formula One"): The "formula", designated in the name, refers to a set of rules, to which all participants' cars must conform.
Relevant evidence: No