assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:0081284 IAO:0000115 A central nervous system benign neoplasm that is characterized by the presence of neurocytes forming pseudorosettes and astrocytes which contain Rosenthal fibers. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/36230557/""}]}"