Complex sentence: Cincinnati's landmark Carew Tower was home to the Mabley & Carew department store from 1930 to 1960, when the business was purchased by Allied Stores, which moved the store across Fifth Street into what had been the Rollman's Department Store.
Split into simpler sentences: Cincinnati's landmark Carew Tower was home to the Mabley & Carew department store from 1930 to 1960, when the business was purchased by Allied Stores. Eventually the store moved the store across Fifth Street into what had been Rollman's Department Store.