assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:9550 IAO:0000115 A multiple myeloma that is characterized by M protein in serum and/or urine and evidence of organ damage related the plasma cell neoplasm. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://seer.cancer.gov/seertools/hemelymph/51f6cf5ae3e27c3994bd54aa/""}]}"