Context: On November 30, 2010, CBC's senior director of regulatory affairs issued a letter to the CRTC regarding CBC's plans for transitioning to digital. The letter states, "CBC/Radio-Canada will not be converting its analogue retransmitters in mandatory markets to digital after August 31, 2011."  On December 16, 2010, some months after the CRTC issued a bulletin reminding broadcasters that analog transmitters had to be shut off by the deadline in mandatory markets, the CBC revised the documents accompanying its August 6, 2010 news release to state that it had the money for and is striving to transition all 27 transmitters by August 31, 2011.

Question: On which day did CBC release an updated announcement stating they were striving to update all 27 transmitters?
Answer: On December 16, 2010

Question: On what date did CBC say it was striving to update its analogue transmitters by?
Answer: August 31, 2011

Question: Why did the CTRC send out a bulletin to broadcasters?
Answer: reminding broadcasters that analog transmitters had to be shut off by the deadline in mandatory markets

Question: The senior director of the CRTC issued a letter to address what concern in November of 2010?
Answer: Unanswerable

Question: On what day did the CRTC plan to take over the CBC?
Answer: Unanswerable

Question: The CRTC let broadcasters know the channels would continue to air in a news release in December of what year?
Answer: Unanswerable

Question: How many transmitters existed for the CRTC to regulate?
Answer: Unanswerable

Question: When did the CBC decide to request an extension to convert their transmitters?
Answer: Unanswerable