SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/ontology/rightTributary> <http://dbpedia.org/resource/TonlÃ©_Sap> }
tonle sap flows into which river?
SELECT DISTINCT ?p WHERE { ?p property:right_tributary resource:TonlÃ©_Sap }
Mekong
[Mekong] is the river with Tonle Sap as a right tributary.
[Mexico City] is a river whose right tributary is the Tonle Sap.