SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/property/nationality> <http://dbpedia.org/resource/United_States> . ?x <http://dbpedia.org/ontology/notableWork> ?uri . }
What are some important works of US citizens?
SELECT DISTINCT ?i WHERE { ?e property:notable_work ?i . . ?e property:nationality resource:United_States }
answer
The notable works of United States citizens are [answer].
Great work by the citizens of the United States [response].