Complex sentence: Antonelli died in a crash on 21 July 2013 at the Moscow Raceway during a Supersport World Championship race, he fell on the back straight in torrential rain and was hit by fellow Italian Lorenzo Zanetti's Honda.
Split into simpler sentences: Antonelli died in a crash on 21 July 2013 at the Moscow Raceway during a Supersport World Championship race. He fell on the back straight in torrential rain and was hit by fellow Italian Lorenzo Zanetti's Honda.