Question: Whose youth clubs used to participate in Argentine Primera Division?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/league> <http://dbpedia.org/resource/Argentine_Primera_División> . ?uri <http://dbpedia.org/property/youthclubs> ?x  . }
Answer: The people whose youth clubs were in Argentine Primera Division league are [answer].