assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:0080599 IAO:0000115 A viral infectious disease that has_material_basis_in Coronavirus. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.cdc.gov/coronavirus/""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/books/NBK7782/""},{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.who.int/health-topics/coronavirus""}]}"