Complex sentence: It is the home stadium of Serie A clubs Lazio and Roma, the venue of the Coppa Italia final, the home venue of the Italian national rugby union team and Italy's national athletics stadium.
Split into simpler sentences: It is the home stadium of Serie A clubs Lazio and Roma, and the venue of the Coppa Italia final. Outside football, the stadium is used by the Italian national rugby union team and Italy's national athletics stadium.