assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:134 IAO:0000115 A vaginal cancer that has_material_basis_in glandular tissue. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.mayoclinic.org/diseases-conditions/vaginal-cancer/symptoms-causes/syc-20352447""}]}"