assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:0081418 IAO:0000115 A kidney sarcoma that is characterized by a proliferation of anaplastic spindle cells with bizarre, pleomorphic nuclei and atypical mitotic figures. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/17895746/""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/27006300/""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/28862265/""}]}"