| http://www.w3.org/ns/prov#value | - Willard posits three key technologies that enable the ???social web??? and make it a potential force for sustainability: the prevalence of handheld computing and communication devices; the ease with which individuals can post, find, and comment on each other???s videos, images, words, and other content; and the potential of social networking sites, including Twitter, Facebook, MySpace, and LinkedI
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