Question: In all the states which have a Uniontown, where does a Keller's mill covered bridge exist too?
SPARQL query:
PREFIX onto: <http://dbpedia.org/ontology/>
SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Uniontown,_Pennsylvania> onto:state ?uri. <http://dbpedia.org/resource/Keller's_Mill_Covered_Bridge> onto:state ?uri . }