sentences:  WVON retained the studios it had used on 1450 in South Lawndale.WNUS-FM changed to a disco format later that year, with a change of call letters to WGCI-FM.In 1977, Combined Communications Corporation purchased Globetrotter Communications, and the following year Combined Communications merged with Gannett Co.
  
  On October 3, 1983, the station's call sign was changed to WGCI.