Question: Which relative of George Madison is the appointer of John Drayton ?
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:John_Drayton prop:appointer ?uri. res:George_Madison onto:relation ?uri}