@prefix foaf: . @prefix ns1: . ns1:mixed-reality foaf:topic _:vb375843 . @prefix md: . ns1:mixed-reality md:item _:vb375843 . @prefix rdf: . _:vb375843 rdf:type "http://schema.org/SiteNavigationElement" . @prefix pwdr: . @prefix ns5: . _:vb375843 pwdr:describedby ns5:mixed-reality .