assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:4817 IAO:0000115 An autonomic nervous system benign neoplasm that is characterized by the presence of mature ganglion cells and a mature Schwannian stroma and arises from the sympathetic trunk in the mediastinum. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007640""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://medlineplus.gov/ency/article/001437.htm""}]}"