Complex sentence: In late 2007, JCPenney announced that it would relocate its existing stores in the mall to a newer, larger location in the former Mervyns, which was also expanded in the process, displacing two mall spaces formerly occupied by Miracle Ear and Big Boy.
Split into simpler sentences: In late 2007, JCPenney announced that it would relocate its existing stores in the mall to a newer, larger location in the former Mervyns space. This space was also expanded in the process, displacing two mall spaces formerly occupied by Miracle Ear and Big Boy.