Question: Which child of Jack Ferguson became a Prime Minister?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Jack_Ferguson> <http://dbpedia.org/ontology/child> ?x . ?x <http://dbpedia.org/property/primeminister> ?uri  . }
Answer: The children of Jack Ferguson became Prime Ministers are [Julia Gillard, Kevin Rudd].