On July 17, 2012, the CRTC approved the shut down of CBC's analogue transmitters, noting that "while the Commission has the discretion to refuse to revoke broadcasting licences, even on application from a licensee, it cannot direct the CBC or any other broadcaster to continue to operate its stations and transmitters." On July 31, 2012, at around 11:59 p.m. in each time zone, the remaining 620 analogue transmitters were shut down, leaving the network with 27 digital television transmitters across the country, and some transmitters operated by some affiliated stations.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): On what date were CBC's remaining analogue transmitters shut down?
Ah, so.. July 31, 2012

The second half of the 20th century to the present has seen a gradual shift towards improved human rights for Aboriginal people. In a 1967 referendum over 90% of the Australian population voted to end constitutional discrimination and to include Aborigines in the national census. During this period many Aboriginal activists began to embrace the term "black" and use their ancestry as a source of pride. Activist Bob Maza said:
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did human rights for Aboriginal people begin to improve?
Ah, so.. The second half of the 20th century

In December 2011, Xinhua stated that "[t]he basic structure of the Beidou system has now been established, and engineers are now conducting comprehensive system test and evaluation. The system will provide test-run services of positioning, navigation and time for China and the neighboring areas before the end of this year, according to the authorities." The system became operational in the China region that same month. The global navigation system should be finished by 2020. As of December 2012, 16 satellites for BeiDou-2 have been launched, 14 of them are in service.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many satellites have been launched as of November, 2013?
Ah, so..
unanswerable