Complex sentence: To fill a hole in the Saturday night line-up, the station created "Saturday Night at Ringside", a multi-hour block of professional wrestling programming hosted by Mick Karch which began in March 1988 and lasted until 1992.
Split into simpler sentences: To fill a hole in the Saturday night lineup, the station created "Saturday Night at Ringside". A multi-hour block of pro wrestling programming hosted by Mick Karch which debuted in March 1988 and lasted until 1992.