Question: Where is the tunnel, which is operated by BNSF railways?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/operatedBy> <http://dbpedia.org/resource/BNSF_Railway> . ?x <http://dbpedia.org/property/location> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/RailwayTunnel>}