List the graves of the royalities which have been buried at Beeleigh Abbey?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/placeOfBurial> <http://dbpedia.org/resource/Beeleigh_Abbey> . ?x <http://dbpedia.org/property/placeOfBurial> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Royalty>}
Beeleigh_Abbey