Question: Count all those whose youth club was managed by Luis Enrique.
SPARQL query: SELECT DISTINCT COUNT(?uri) WHERE { ?x <http://dbpedia.org/property/manager> <http://dbpedia.org/resource/Luis_Enrique_(footballer)> . ?uri <http://dbpedia.org/property/youthclubs> ?x  . }
Answer: There are [319] people whose youth clubs manager was Luis Enrique.