Complex sentence: During its days as an NBC affiliate, WTVO preempted a good number of network shows particularly in weekday and Saturday daytime as well as the Saturday edition of the "NBC Nightly News" in the 1980s.
Split into simpler sentences: During its days as an NBC affiliate, WTVO preempted a good number of network shows, particularly in weekday and Saturday daytime. It also pre-empted the Saturday edition of the "NBC Nightly News" in the 1980s.