Question: Name the river  whose source location is Nevado Mismi and region is Arequipa Region?
SPARQL query:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX prop: <http://dbpedia.org/property/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE {?uri prop:sourceLocation <http://dbpedia.org/resource/Nevado_Mismi> . ?uri prop:sourceRegion <http://dbpedia.org/resource/Arequipa_Region>  . ?uri rdf:type onto:River}