assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:7902 IAO:0000115 An extraskeletal myxoid chondrosarcoma occurring in adults. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/35144048/""}]}"