Question: In which countries have the Start + Flug aircrafts originated?
SPARQL:
SELECT DISTINCT ?uri WHERE { ?x <http://dbpedia.org/ontology/manufacturer> <http://dbpedia.org/resource/Start_+_Flug> . ?x <http://dbpedia.org/property/nationalOrigin> ?uri . ?x <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://dbpedia.org/ontology/Aircraft>}