Complex sentence: Cigna moved to KDKA-AM in Pittsburgh on March 11,1973, when he hosted a talk show from 9:00 PM to midnight until 1983, where he moved to the morning slot after previous morning host Jack Bogut moved to WTAE-AM.
Split into simpler sentences: Cigna moved to KDKA-AM in Pittsburgh on March 11,1973, when he hosted a talk show from 9:00 PM to midnight. Cigna's late night tenure lasted until 1983, where he moved to the morning slot after previous morning host Jack Bogut moved to WTAE-AM.