assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:4857 IAO:0000115 A low grade glioma that is characterized by diffuse infiltration of neighboring central nervous system structures. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://braintumorcenter.ucsf.edu/condition/diffuse-astrocytoma-grade-ii""}]}"