_:vb50999580 "Sean Bechhofer" . . . _:vb50999580 "2008-05-xx" . _:vb50999580 . . "An abstract idea or notion; a unit of thought."@en . "2008-05-xx" . _:vb50999580 "Initial description." . . . "Concept"@en . _:vb50999580 .