SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/arena> <http://dbpedia.org/resource/United_Center> . ?uri <http://dbpedia.org/property/team> ?x . }
Who all play for the teams performing in the united center?
SELECT DISTINCT ?v WHERE { ?i property:arena resource:United_Center . ?v property:team ?i . }
answer
The players whose team's arena is United Center are [answer].
[answer] play for the teams performing in the united center.