Question: What is the national origin of Dornier Aerodyne and Hirth Acrostar ?;
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Dornier_Aerodyne> <http://dbpedia.org/property/nationalOrigin> ?uri. <http://dbpedia.org/resource/Hirth_Acrostar> <http://dbpedia.org/ontology/origin> ?uri}