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