Question: Which railway line goes through the stations which are a part of the North Caucasus railway?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX res: <http://dbpedia.org/resource/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x onto:type <http://dbpedia.org/resource/North_Caucasus_Railway> . ?x onto:servingRailwayLine ?uri . ?x rdf:type onto:Station}