Complex sentence: It was also announced that The Mosaic Company would renew its naming rights under a 20-year deal with the Roughriders; as such, the new stadium will also be known as Mosaic Stadium.
Split into simpler sentences: It was also announced that The Mosaic Company, who held naming rights for the previous stadium, would renew them to cover the new stadium under a 20-year deal. As such, the new stadium will also be known as Mosaic Stadium.