Question: Which politician's son is buried in Metairie Cementery?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/placeofburial> <http://dbpedia.org/resource/Metairie_Cemetery> . ?uri <http://dbpedia.org/ontology/child> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/OfficeHolder>}
Answer: The politicians whose sons are buried in Metairie Cementery are [Margaret Taylor, Zachary Taylor].