assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:0050804 IAO:0000115 A glioblastoma that is characterized by IDH1 and p53 mutations and Platelet Derived Growth Factor A amplification. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007645""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:http://cancergenome.nih.gov/researchhighlights/researchbriefs/foursubtypes""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pubmed/20129251""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/pubmed/23029035""}]}"