What is the occupation of the people who are born in Iowa?
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/birthPlace> <http://dbpedia.org/resource/Iowa> . ?x <http://dbpedia.org/ontology/occupation> ?uri  . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Person>}
Iowa