Question: South Side elevated railroad and twin cities 400 are operated by which city?
SPARQL query: SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/South_Side_Elevated_Railroad> <http://dbpedia.org/ontology/operatedBy> ?uri. <http://dbpedia.org/resource/Twin_Cities_400> <http://dbpedia.org/ontology/operatedBy> ?uri . }
Answer: [Chicago] is the operated by of the South Side Elevated Railroad and Twin Cities 400.