Question: What is the official residence of the senator who is the deputy of Everett Dirksen?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Everett_Dirksen> prop:deputy ?x . ?x onto:residence ?uri  . ?x rdf:type onto:Senator}