assertion retraction graph subject predicate object datatype annotation 1 0 graph rdfs:comment rdf:type owl:AnnotationProperty _IRI 1 0 graph OBI:9991118 rdf:type owl:AnnotationProperty _IRI 1 0 graph rdf:type owl:AnnotationProperty _IRI 1 0 graph dce:type rdf:type owl:AnnotationProperty _IRI