| http://www.w3.org/ns/prov#value | - Their ???inventory??? (sites which have offered space for a link) is very, very poor at least when it comes to education (some blogs with two orders of magnitude less traffic than this one, for example, and a couple dozen sites which exist only to make a profit, not to provide anything of value to the visitors), and most of the pages are chock-full of links already.
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