Question: Name the country whose leader's deputy is Piotr Glinski?
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 { ?x prop:deputy <http://dbpedia.org/resource/Piotr_Gliński> . ?uri prop:leaderName ?x . ?uri rdf:type onto:Country}