PREFIX vivo: PREFIX owl: PREFIX foaf: CONSTRUCT { ?advisee _:AdviseeRole . _:AdviseeRole ?advisee . _:AdviseeRole a vivo:AdviseeRole . _:AdviseeRole vivo:relatedBy ?advisingRelationship . ?advisingRelationship vivo:relates _:AdviseeRole . ?advisingRelationship vivo:relates ?advisee . ?advisee vivo:relatedBy ?advisingRelationship . } WHERE { ?advisee vivo:adviseeIn ?advisingRelationship . FILTER NOT EXISTS { ?advisee ?adviseeRoleNode . ?adviseeRoleNode vivo:relatedBy ?advisingRelationship . } }