SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/youthclubs> <http://dbpedia.org/resource/Newell's_Old_Boys> }
Which football players have Newell's Old Boys as youthclub?
SELECT DISTINCT ?n WHERE { ?n property:youthclubs resource:Newell's_Old_Boys }
answer
The players whose youthclub is Newell's Old Boys are [answer].
The players from Newell's Old Boys club are [the answer].