Question: Where is the mouth of the river whose tributary is Bjelimićka  Rijeka ?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x onto:rightTributary res:Bjelimićka_Rijeka . ?x onto:mouthCountry ?uri . }