Question: Who is the prime minister of Michael Jeffery who is also the minister of Williuam Deane ?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Michael_Jeffery> <http://dbpedia.org/property/primeminister> ?uri. <http://dbpedia.org/resource/William_Deane> <http://dbpedia.org/ontology/primeMinister> ?uri}