Question: What is the river one of whose left tributary's native name is Arabic?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { ?x prop:nativeName res:Arabic . ?uri onto:leftTributary ?x . }