Question: What is the common location of  tomb of the Elizabeth of Rhuddlan and Isabel of Cambridge?
SPARQL:
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Elizabeth_of_Rhuddlan> <http://dbpedia.org/property/placeOfBurial> ?uri. <http://dbpedia.org/resource/Isabel_of_Cambridge,_Countess_of_Essex> <http://dbpedia.org/property/placeOfBurial> ?uri . }