Question: Who is the common prime minster of William Deaner and mark Latham ?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { res:William_Deane onto:primeMinister ?uri. res:Mark_Latham prop:primeminister ?uri}