This question references a Formula 1 race at Valencia on August 23, 2009. It asks how many races had previously taken place at that circuit. The answer of '1' suggests this was the second race at the Valencia circuit, with one prior event.
Valencia's street circuit joined the F1 calendar hosting the European Grand Prix starting in 2008. By the time of the 23 August 2009 race, only that single 2008 edition had been run before it, making the 2009 race the second Valencia Grand Prix overall. So the count of prior races is 1.