assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:10194 IAO:0000115 A lipoma that is located in the kidney. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.mayoclinic.org/diseases-conditions/lipoma/symptoms-causes/syc-20374470""}]}"