@prefix rdf: . @prefix ns1: . @prefix oa: . ns1:BDB8763A-8D2E-11E9-9698-E142512C6F17 rdf:type oa:SpecificResource . @prefix pwdr: . @prefix ns4: . ns1:BDB8763A-8D2E-11E9-9698-E142512C6F17 pwdr:describedby ns4:openlink_site_search ; oa:hasSelector ; oa:hasSource .