Complex sentence: KTBC had a 6 p.m. newscast until 2000, when it was discontinued in favor of an expansion of the 5 p.m. newscast to a full hour; however, the station does presently carry a 6 p.m. newscast on Saturday evenings.
Split into simpler sentences: KTBC had a 6 p.m. newscast until 2000, when it was discontinued in favor of an expansion of the 5 p.m. newscast to a full hour. However, the station does presently carry a 6 p.m. newscast on Saturday evenings.