assertion  retraction  graph  subject    predicate    object                                                                   datatype    annotation
1          0           graph  DOID:7808  IAO:0000115  An uveal melanoma characterized by the presence of tumor cell necrosis.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.nature.com/articles/eye2016275""}]}"