Question: Who all have succeeded the kings buried in Rome?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/placeOfBurial> <http://dbpedia.org/resource/Rome> . ?x <http://dbpedia.org/ontology/successor> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Royalty>}
Answer: The successor of kings who have graves in Rome are [Tiberius, Claudius, Caligula, Kingdom of Italy (Napoleonic)].