[
  {
    "assertion": 1,
    "retraction": 0,
    "graph": "graph",
    "subject": "oio:hasDbXref",
    "predicate": "rdfs:label",
    "object": "database_cross_reference",
    "datatype": "xsd:string",
    "annotation": ""
  },
  {
    "assertion": 1,
    "retraction": 0,
    "graph": "graph",
    "subject": "oio:hasDbXref",
    "predicate": "rdf:type",
    "object": "owl:AnnotationProperty",
    "datatype": "_IRI",
    "annotation": ""
  }
]