http://dbpedia.org/resource/Lee_Hsien_Loong__Tenure__3 <http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#TimeInterval> dbpedia-owl:start xsd:date 1991-08-21 rdf:type <http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#TimeInterval> dbpedia-owl:TimePeriod dbpedia-owl:Tenure data from the linked data cloud