Question: Which leader of united states house representatives election was married to Dolley Madison ?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/United_States_House_of_Representatives_elections,_1788_and_1789> <http://dbpedia.org/property/leader> ?uri. <http://dbpedia.org/resource/Dolley_Madison> <http://dbpedia.org/ontology/spouse> ?uri}