SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Republican_River> <http://dbpedia.org/ontology/leftTributary> ?x . ?x <http://dbpedia.org/ontology/state> ?uri . }
Through which states do the rivers flow which join in the republican river from the left?
SELECT DISTINCT ?g WHERE { ?y property:state ?g . . resource:Republican_River property:left_tributary ?y }
Colorado, Nebraska
The states of the river which are the left tributary of Republican River are [Colorado, Nebraska].
[Colorado, Missouri] are states that the rivers flow through which join in the republican river from the left.