PREFIX   ex:  <http://example.org/>
PREFIX  rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX rdfs:  <http://www.w3.org/2000/01/rdf-schema#>
PREFIX  owl:  <http://www.w3.org/2002/07/owl#> 

SELECT ?x ?y
WHERE { 
	 ?x rdf:type _:c . 
	_:c owl:intersectionOf ( ex:Student ex:Employee ) .
	 ?x ex:name ?y .
}