SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/sourceRegion> <http://dbpedia.org/resource/North-Western_Province,_Zambia> }
What is the river whose origin is North-Western Province, Zambia?
SELECT DISTINCT ?r WHERE { ?r property:source_region resource:North-_Western_Province,_Zambia }
Zambezi
The river whose source region is North-Western Province, Zambia is [Zambezi].
The river whose headwaters are in the northwestern province of Zambia is [Zambezi].
[Zambezi] is the river whose source region is North-Western Province, the country.
[Zambezi] is a river originating in the north-western province of the country.