Complex sentence: In July 14,2011, it returned to the airwaves as a test broadcast, debuting as Radio High 105.9 It is adopting the format of the defunct 923 Joey and 106.7 Dream FM.
Split into simpler sentences: In July 14,2011, it returned to the airwaves as a test broadcast, debuting as Radio High 105.9. It adopted the format of the defunct 923 Joey and 106.7 Dream FM.