Question: Which city was founded by  George Washington and John Forbes (British Army officer)?
SPARQL:
SELECT DISTINCT ?uri WHERE {?uri <http://dbpedia.org/property/founder> <http://dbpedia.org/resource/George_Washington> . ?uri <http://dbpedia.org/ontology/founder> <http://dbpedia.org/resource/John_Forbes_(British_Army_officer)>  . ?uri <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/City>}