SELECT DISTINCT ?uri WHERE { ?uri <http://dbpedia.org/property/mouthLocation> <http://dbpedia.org/resource/Arctic_Ocean> . ?uri <http://dbpedia.org/property/mouthLocation> <http://dbpedia.org/resource/Laptev_Sea> . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/River>}
What is the river whose mouth locations are Arctic Ocean and Laptev Sea?
SELECT DISTINCT ?f WHERE { ?f property:mouth_location resource:Laptev_Sea . ?f property:mouth_location resource:Arctic_Ocean . ?f rdf:type ontology:River }
Lena River
[Lena River] is the river whose mouth locations are both Arctic Ocean and Laptev Sea.
[Lena River] is a river whose mouth is both the Arctic Ocean and the Black Sea.