inputs: hypothesis: The ban is not the first ban for YouTube in China. premise: Although it won't discuss it, the Chinese government frequently blocks foreign Web sites that it deems to have objectionable content. Access to YouTube was also blocked in 2007, and 2008 during high-profile government meetings and following last year's unrest in Tibet. YouTube has been blocked at least twice in the last month, according to Herdict Web, a censorship tracking system run by Harvard University's Berkman Center for Internet and Society. The first block came on March 4, coinciding with the 50th anniversary of the Tibetan Uprising on March 10. The current block began on March 23.