Complex sentence: WBZ was the first Boston television station to have a regularly-scheduled late afternoon news program; in the 1970s, the station aired "First 4 News" at 5:30 p.m., anchored by Gail Harris.
Split into simpler sentences: WBZ was the first Boston station to have a regularly-scheduled late afternoon news program. In the 1970s, the station aired "First 4 News" at 5:30 p.m., anchored by Gail Harris.