Complex sentence: During their tenures as mayor, Clark and Dilworth introduced a variety of reforms and innovations, including extensive high-rise public housing which, a generation later, was condemned by many as a breeding ground for poverty and crime.
Split into simpler sentences: During their tenures as mayor, Clark and Dilworth introduced a variety of reforms and innovations. Among these was extensive high-rise public housing which would, a generation later, be condemned by many as a breeding ground for poverty and crime.