Complex sentence: The station moved from channel 79 to channel 57 on July 1,1983 because Industry Canada reassigned frequencies (TV channels 70-83) to the new cellular phone systems AMPS mobile phones as a result of a CCIR international convention in 1982.
Split into simpler sentences: The station moved from channel 79 to channel 57 on July 1,1983. This was due to Industry Canada's reassignment of frequencies (TV channels 70-83) to the new cellular phone systems AMPS mobile phones as a result of a CCIR international convention in 1982.