Complex sentence: At one time KJMG used to be a Sports Broadcasting Radio Station back in 1977 until 1998 when new owners Holladay Broadcasting changed the stations name and format to Majic 97 (97.3 FM) broadcasting an urban adult contemporary format.
Split into simpler sentences: At one time, KJMG used to be a Sports Broadcasting Radio Station from 1977. In 1998, new owners Holladay Broadcasting changed the station's name and format to Majic 97 (97.3 FM) broadcasting an urban adult contemporary format.