. _:vb50820615 . "RDF Interfaces" . _:vb50820613 "Manu Sporny" . . _:vb50820614 . _:vb50820612 . _:vb50820614 . _:vb50820613 . . _:vb50820613 . . _:vb50820612 . _:vb50820615 . _:vb50820612 "Nathan Rixham" . "2012-07-05" . . _:vb50820614 "Benjamin Adrian" . _:vb50820615 .