Question: What are the political parties whose leaders have lived in the Prime Minister's House?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/residence> <http://dbpedia.org/resource/Prime_Minister's_House_(Colombo)> . ?uri <http://dbpedia.org/ontology/leader> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/PoliticalParty>}
Answer: The political parties whose leader's residence was Prime Minister's House are [United National Party, United National Front (Sri Lanka)].