Complex sentence: The Toronto Argonauts hosted the Montreal Alouettes at the University of Toronto's Varsity Stadium for their preseason game, the first Argonauts game at Varsity Stadium in 55 years.
Split into simpler sentences: The Toronto Argonauts will host the Montreal Alouettes at the University of Toronto's Varsity Stadium for their preseason game. It will be the first time that the Argonauts will play at Varsity Stadium in 55 years.