source: The first Italian Grand Prix motor racing championship took place on 4 September 1921 at Brescia
target: The first Italian Grand Prix motor racing held on 4 September 1921 at Brescia.
references: The first Italian Grand Prix motor racing held on 4 September 1921 at Brescia. Brescia hosted the first Italian Grand Prix championship race on September 4 , 1921. The first Italian Grand Prix motor racing championship took place on September 4 , 1921 at Brescia. The first Italian Grand Prix motor racing championship happened on 4 September 1921 at Brescia. The first Italian Grand Prix motor racing championship took place on 4 September 1921 at Brescia. The first Italian Grand Prix motor racing championship took place on September 4 1921. The Italian Grand Prix motor racing championship was first ever held at Brescia on 4 September 1921