Complex sentence: The Rome derby is a yearly football match between Lazio and Roma in their Stadio Olimpico, more intense and personal than most matches, and historically marked by massive crowds, excitement, violence, and (recently) racist banners in the crowd.
Split into simpler sentences: The Rome derby is a yearly football match between Lazio and Roma in their Stadio Olimpico. It has been historically marked by massive crowds, excitement, violence, and (recently) racist banners in the crowd.