Question: Which relative of George Madison was the leader of United States House of Representatives elections, 1788 and 1789 ?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/George_Madison> <http://dbpedia.org/ontology/relation> ?uri. <http://dbpedia.org/resource/United_States_House_of_Representatives_elections,_1788_and_1789> <http://dbpedia.org/property/leader> ?uri}