Complex sentence: Child World, a toy store chain, was added to the west end of the mall in 1989; this store closed three years later and was eventually converted to a paintball arena which closed in the mid- 2000s.
Split into simpler sentences: Child World, a toy store chain, was added to the west end of the mall in 1989. This store closed three years later and was eventually converted to a paintball arena which closed in the mid- 2000s.