source: The first Italian Grand Prix motor racing championship took place on 4 September 1921 at Brescia.
target: The first Grand Prix championship took place on September 4, 1921 at Brescia.
references: The first Grand Prix championship took place on September 4, 1921 at Brescia. The first Italian Grand Prix motor racing championship took place 4 September 1921 at Brescia. The first Italian Grand Prix motor racing championship was held on September 4, 1921. It was held at Brescia. The first Italian Grand Prix motor racing championship was at Brescia on September 4th, 1921. The first Italian Grand Prix motor racing championship was held at Brescia on September 4th 1921. The first Italian Grand Prix motor racing championship was on September 4, 1921.  It took place at Brescia. On September 4, 1921, the first Grand Prix took place at Brescia. The first Italian Grand Prix motor racing championship was on 4 September 1921 at Brescia. The first Italian Grand Prix took place on 4 September 1921 at Brescia. The first Italian Grand Prix racing championship was on 4 September 1921 at Brescia.