Complex sentence: In 2012, after the departure of Lane Bryant, FYE moved into the former Hallmark store, shrinking its overall space, while the combined FYE/Lane Bryant space by the Sears wing is being converted into a Forever 21, a first for the mall.
Split into simpler sentences: In 2012, following the departure of Lane Bryant, FYE moved into the former Hallmark store, shrinking its overall space. The consolidated FYE/Lane Bryant space in the Sears wing was converted into a Forever 21, a first for the mall.