protected void importInverseOf(OWLOntology o, OWLObjectProperty objectProperty) {
    String iri = objectProperty.getIRI().toString();
    Relationship fromRelationship = null;

    for (OWLObjectPropertyExpression inverseOf : objectProperty.getInverses(o)) {
      if (inverseOf instanceof OWLObjectProperty) {
        if (fromRelationship == null) {
          fromRelationship = getRelationshipByIRI(iri);
        }

        OWLObjectProperty inverseOfOWLObjectProperty = (OWLObjectProperty) inverseOf;
        String inverseOfIri = inverseOfOWLObjectProperty.getIRI().toString();
        Relationship inverseOfRelationship = getRelationshipByIRI(inverseOfIri);
        getOrCreateInverseOfRelationship(fromRelationship, inverseOfRelationship);
      }
    }
  }