Question: Through which states does the stream ending at Saunders county go?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/mouthLocation> <http://dbpedia.org/resource/Saunders_County,_Nebraska> . ?x <http://dbpedia.org/ontology/state> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Stream>}