Complex sentence: CFCV was replaced by ten-watt CBSAT channel 21, then went dark as all CBC/Radio-Canada owned and operated rebroadcasters were shut down nationally on August 1,2012.
Split into simpler sentences: CFCV was replaced by ten-watt CBSAT channel 21. All CBC/Radio-Canada owned and operated rebroadcasters were shut down nationally on August 1,2012.