Dreyfus writes that after the Phagmodrupa lost its centralizing power over Tibet in 1434, several attempts by other families to establish hegemonies failed over the next two centuries until 1642 with the 5th Dalai Lama's effective hegemony over Tibet.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What year did the Phagmodrupa lose their power over Tibet?
Ah, so.. 1434

On October 31, 2013, after outcry from media outlets, including heavy criticism from Nick Bilton of The New York Times, the FAA announced it will allow airlines to expand the passengers use of portable electronic devices during all phases of flight, but mobile phone calls will still be prohibited. Implementation will vary among airlines. The FAA expects many carriers to show that their planes allow passengers to safely use their devices in airplane mode, gate-to-gate, by the end of 2013. Devices must be held or put in the seat-back pocket during the actual takeoff and landing. Mobile phones must be in airplane mode or with mobile service disabled, with no signal bars displayed, and cannot be used for voice communications due to Federal Communications Commission regulations that prohibit any airborne calls using mobile phones. If an air carrier provides Wi-Fi service during flight, passengers may use it. Short-range Bluetooth accessories, like wireless keyboards, can also be used.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): When did the FAA begin to allow mobile phone calls during flights?
Ah, so.. unanswerable

On June 18, 2009, the National Archives announced the launching of a YouTube channel "to showcase popular archived films, inform the public about upcoming events around the country, and bring National Archives exhibits to the people." Also in 2009, the National Archives launched a Flickr photostream to share portions of its photographic holdings with the general public. A new teaching with documents website premiered in 2010 and was developed by the education team. The website features 3,000 documents, images, and recordings from the holdings of the Archives. The site also features lesson plans and tools for creating new classroom activities and lessons.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What website was created in 2009 that was developed by the public?
Ah, so..
unanswerable