PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
PREFIX owl: <http://www.w3.org/2002/07/owl#>  
PREFIX : <http://www.lehigh.edu/~zhp2/2004/0401/univ-bench.owl#>

SELECT ?person
WHERE {
	?person a [
	  owl:intersectionOf ( 
	  	[
	    	owl:unionOf( :FullProfessor :Lecturer ) 
	    ]  
	    [	    		    
      	    owl:onProperty :teacherOf ;
      	    owl:someValuesFrom :GraduateCourse	     
	    ]	    		    		 
	  )
	]
	. 
}