Question: Who are the players whose current clubs have Ferran Soriano as chairman?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/chairman> <http://dbpedia.org/resource/Ferran_Soriano> . ?uri <http://dbpedia.org/property/currentclub> ?x  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Person>}