SELECT ?sal, ?t, ?x  
FROM	<http://ilrt.org/discovery/2000/11/rss-query/jobs-rss.rdf>,
	<http://ilrt.org/discovery/2000/11/rss-query/jobs.rss>
WHERE 
   (?x, job:advertises, ?y),
   (?y, job:salary, ?sal),
   (?y, job:title, ?t) 
AND (?sal >= 100000)
USING job for <http://ilrt.org/discovery/2000/11/rss-query/jobvocab.rdf#>