<prompt> Pedzisa mutsara unotevera: Yakavakwa muna 1971, gungano racho rakaita nhambo mbiri dzeFormula One Belgian Grand Prix muna  <response>: 1972 na1974 munguva apo mujaho waifanira kuchinja pakati peWalloon neFlemish circuits. Yakagadzirwa naRoger Caignie kuti ive imwe nzira yakachengeteka kuSpa, Nivelles zvimwe yakanga yakachengeteka zvikuru. Yaiva nenzvimbo huru dzokuyerera, yakanga yakatwasuka uye isina chinhu, uye yakarondedzerwa navatyairi vazhinji seyakanga isina kunaka uye isina tsvina. Nivelles yakanga isingafarirwi pakati pevaoni vaibhadhara sezvo vaifunga kuti vakanga vasiri pedyo zvakakwana nechiito. 