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