http://dbpedia.org/resource/Ralph_D._Hetzel__Tenure__2 <http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#TimeInterval> dbpedia-owl:title rdf:langString President of the Pennsylvania State University rdf:type <http://www.ontologydesignpatterns.org/ont/dul/DUL.owl#TimeInterval> dbpedia-owl:TimePeriod dbpedia-owl:Tenure dbpedia-owl:predecessor dbpedia:John_Martin_Thomas dbpedia-owl:successor dbpedia:James_Milholland data from the linked data cloud