SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/South_Side_Elevated_Railroad> <http://dbpedia.org/ontology/operatedBy> ?uri }
Who operates the south side elevated railroad?
SELECT DISTINCT ?k WHERE { resource:South_Side_Elevated_Railroad property:operated_by ?k }
Chicago
[Chicago] is the operator of the South Side Elevated Railroad .
[Chicago] operates the Southern Elephant Railway.