Complex sentence: The former Crumlin Road Jail building nearby has become a very popular visitor attraction, and there has been much published as to how the area can be regenerated for people of the vicinity and Belfast as well as visitors to the city.
Split into simpler sentences: The former Crumlin Road Gaol (prison) building nearby has become a very popular visitor attraction. There has been much published as to how the area can be regenerated for people of the vicinity and Belfast as well as visitors to the city.