Question: Count everyone who was in a youthclub chaired by Josep Maria Bartomeu?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
SELECT DISTINCT COUNT(?uri) WHERE { ?x prop:chairman <http://dbpedia.org/resource/Josep_Maria_Bartomeu> . ?uri prop:youthclubs ?x . }