SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/property/youthclubs> <http://dbpedia.org/resource/FC_Barcelona> . ?uri <http://dbpedia.org/property/youthclubs> <http://dbpedia.org/resource/Newell's_Old_Boys> . }
Who was in youth clubs of FC Barcelona and Newell's Old Boys?
SELECT DISTINCT ?k WHERE { ?k property:youthclubs resource:F_C_Barcelona . ?k property:youthclubs resource:Newell's_Old_Boys . }
Lionel Messi
The person whose youth clubs are FC Barcelona and Newell's Old Boys is [Lionel Messi].
[Lionel Messi] was in youth clubs of FC Barcelona and Newell's Old Boys.