@prefix rdf: . @prefix ecrm: . rdf:type ecrm:E21_Person . @prefix rdfs: . rdfs:label "Albert DeRuiter" . @prefix foaf: . foaf:name "Albert DeRuiter" ; foaf:firstName "Albert" ; ecrm:P131_is_identified_by "DeRuiter, Albert" ; foaf:surname "DeRuiter" .