Complex sentence: In 2005, the Downtown Center experienced a significant change with many merchants being forced to close due to the construction of the Sundquist Pavilion and Riley Park which hosts the Saturday Farmers Market, Friday Summer Concert Series, and numerous other activities.
Split into simpler sentences: In 2005, the Downtown Center experienced a significant change with many merchants being forced to close. The Sundquist Pavilion and Riley Park host the Saturday Farmers Market, Friday Summer Concert Series, and numerous other activities.