Question: Who currently operates the railway lines one of whose stockholder is Chicago, St Paul, Minneapolis and Omaha railway?
SPARQL query: SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/owner> <http://dbpedia.org/resource/Chicago,_St._Paul,_Minneapolis_and_Omaha_Railway> . ?x <http://dbpedia.org/ontology/operatedBy> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/RailwayLine>}
Answer: [Chicago] is the operator  of the railway line whose stockholders are Chicago, St. Paul, Minneapolis and Omaha Railway.