assertion retraction graph subject predicate object datatype annotation 1 0 graph obo:SYMP_0000882 IAO:0000115 A fever that is characterized by an elevated temperature. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://www.wrongdiagnosis.com/sym/high_fever.htm""}]}"