ASK WHERE { <http://dbpedia.org/resource/Saint_Lawrence_River> <http://dbpedia.org/ontology/sourceMountain> <http://dbpedia.org/resource/Kingston,_Ontario> }
Does the St lawrence river start in Kingston, Ontario?
ASK WHERE { resource:Saint_Lawrence_River property:source_mountain resource:Kingston,_Ontario }
Yes
[Yes], Kingston, Ontario is the source mountain of Saint Lawrence River.
[Yes], the St lawrence river start in Kingston, Ontario.