Question: Whihc successor of McDonnell Douglas was built bu Delta 3 ?
SPARQL:
 SELECT DISTINCT ?uri WHERE { <http://dbpedia.org/resource/Delta_III> <http://dbpedia.org/ontology/manufacturer> ?uri. <http://dbpedia.org/resource/McDonnell_Douglas> <http://dbpedia.org/property/successor> ?uri}