assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:2127 IAO:0000115 A brain cancer that is characterized by abnormally proliferating cells, derives_from germ cells. xsd:string "{""dce:type"":[{""datatype"":""_IRI"",""meta"":""owl:Axiom"",""object"":""obo:ECO_0007638""}],""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://en.wikipedia.org/wiki/Germinoma""}]}"