Question: What is the common citizenship between JSM Hopoer and Robert Valentine ?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/J._S._M._Hooper> onto:citizenship ?uri. <http://dbpedia.org/resource/Robert_Valentine_(composer)> onto:country ?uri}