What is the {railway company} for {owner of} of {Gotthard Base Tunnel}
What railway company does the owner of GBT possess?
Which railway company does the owner of the Gotthard Base Tunnel have
SELECT DISTINCT ?z WHERE { ?z rdf:type ontology:railway_company . ?z property:owner_of resource:Gotthard_Base_Tunnel }
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P1830> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q193002> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q249556> } 
 select distinct ?sbj where { ?sbj wdt:P1830 wd:Q193002 . ?sbj wdt:P31 wd:Q249556 } 