assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:5697 IAO:0000115 An ovary sarcoma that arises from fatty tissue. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/32656967/""}]}"