Question:  Giuseppe Bertello and Pietro Parolin are leaders of which place ?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?uri onto:leader <http://dbpedia.org/resource/Giuseppe_Bertello> . ?uri onto:leader <http://dbpedia.org/resource/Pietro_Parolin> . ?uri rdf:type onto:Place}