Question: Under which president did some politicians live in Kensington?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x onto:residence <http://dbpedia.org/resource/Kensington,_Maryland> . ?x onto:president ?uri  . ?x rdf:type onto:OfficeHolder}