assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:5048 IAO:0000115 A pituitary gland benign neoplasm that arises from the neurohypophysis. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://pubmed.ncbi.nlm.nih.gov/33709954/""}]}"