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