Question: In which states does the river flow whose left tributary is Toms Creek?
SPARQL query:
PREFIX res: <http://dbpedia.org/resource/>
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Toms_Creek_(Monocacy_River)> onto:leftTributary ?x . ?x onto:state ?uri . }